Gasoline

Source: Wikipedia, the free encyclopedia.

Gasoline in a glass jar

Gasoline (

gasoline additives. It is a high-volume profitable product produced in crude oil refineries.[1]

The fuel-characteristics of a particular gasoline-blend, which will resist igniting too early—and cause

Gasoline can enter the Earth's environment as an un-combusted liquid fuel, as a flammable liquid, or as a vapor by way of leakages occurring during its production, handling, transport and delivery.[4] Gasoline contains known carcinogens.[5][6][7] Gasoline is often used as a recreational inhalant and can be harmful or fatal when used in such a manner.[8] When burned, one liter (0.26 U.S. gal) of gasoline emits about 2.3 kilograms (5.1 lb) of

human-caused climate change.[9][10] Oil products, including gasoline, were responsible for about 32% of CO2 emissions worldwide in 2021.[11]

On average, U.S. petroleum refineries produce about 19 to 20 gallons of gasoline, 11 to 13 gallons of distillate fuel

barrel of crude oil. The product ratio depends upon the processing in an oil refinery and the crude oil assay[12] (see § Etymology
).

Etymology

gas can
lists capacity in three measures: U.S. gallon, Imperial gallon, and liters
A modern gasoline container is made of colored, plastic material that does not rust, whilst the red color exclusively identifies a fuel container.[13]

The American English word gasoline denotes fuel for

automobiles, which common usage shortened to the terms gas, motor gas, and mogas, and thus differentiated that fuel from avgas (aviation gasoline), which is fuel for aeroplanes. The term gasoline originated from the trademark terms Cazeline and Gazeline, which were stylized spellings and pronunciations of Cassell, the surname of British businessman John Cassell, who, on 27 November 1862, placed the following fuel-oil advertisement in The Times
of London:

The Patent Cazeline Oil, safe, economical, and brilliant [...] possesses all the requisites which have so long been desired as a means of powerful artificial light.[14]

That 19th-century advert is the earliest occurrence of Cassell's

"gas bar" or "gas station" in Canada and the United States.[16]

Coined from

Carless Refining and Marketing Ltd.[19] When Petrol found a later use as a motor fuel, Frederick Simms, an associate of Gottlieb Daimler, suggested to John Leonard, owner of Carless, that they trademark the word and uppercase spelling Petrol.[20] The trademark application was refused because petrol had already become an established general term for motor fuel.[21] Due to the firm's age,[citation needed] Carless retained the legal rights to the term and to the uppercase spelling of "Petrol" as the name of a petrochemical product.[22][23]

British refiners originally used "motor spirit" as a generic name for the automotive fuel and "aviation spirit" for aviation gasoline. When Carless was denied a trademark on "petrol" in the 1930s, its competitors switched to the more popular name "petrol". However, "motor spirit" had already made its way into laws and regulations, so the term remains in use as a formal name for petrol.[24][25] The term is used most widely in Nigeria, where the largest petroleum companies call their product "premium motor spirit".[26] Although "petrol" has made inroads into Nigerian English, "premium motor spirit" remains the formal name that is used in scientific publications, government reports, and newspapers.[27]

The use of the word gasoline instead of petrol is uncommon outside North America,[28][failed verification][unreliable source?] although gasolina is used in Spanish and Portuguese and gasorin is used in Japanese.

In many languages, the name of the product is derived from the hydrocarbon compound benzene or more precisely from the class of products called petroleum benzine, such as benzin in German or benzina in Italian; but in Argentina, Uruguay, and Paraguay, the colloquial name nafta is derived from that of the chemical naphtha.[29]

Some languages, like French and Italian, use the respective words for gasoline to indicate diesel fuel.[30]

History

The first internal combustion engines suitable for use in transportation applications, so-called

n-octane boils at 125.62 °C (258.12 °F)[31]), it was well-suited for early carburetors (evaporators). The development of a "spray nozzle" carburetor enabled the use of less volatile fuels. Further improvements in engine efficiency were attempted at higher compression ratios, but early attempts were blocked by the premature explosion of fuel, known as knocking
.

In 1891, the Shukhov cracking process became the world's first commercial method to break down heavier hydrocarbons in crude oil to increase the percentage of lighter products compared to simple distillation.

1903 to 1914

The evolution of gasoline followed the evolution of oil as the dominant source of energy in the industrializing world. Before World War One, Britain was the world's greatest industrial power and depended on its navy to protect the shipping of raw materials from its colonies. Germany was also industrializing and, like Britain, lacked many natural resources which had to be shipped to the home country. By the 1890s, Germany began to pursue a policy of global prominence and began building a navy to compete with Britain's. Coal was the fuel that powered their navies. Though both Britain and Germany had natural coal reserves, new developments in oil as a fuel for ships changed the situation. Coal-powered ships were a tactical weakness because the process of

Royal Dutch Shell and the Anglo-Persian Oil Company
and this determined from where and of what quality its gasoline would come.

During the early period of gasoline engine development, aircraft were forced to use motor vehicle gasoline since aviation gasoline did not yet exist. These early fuels were termed "straight-run" gasolines and were byproducts from the distillation of a single crude oil to produce

(tendency to vaporize) specified in terms of boiling points, which became the primary focuses for gasoline producers. These early eastern crude oil gasolines had relatively high Baumé test results (65 to 80 degrees Baumé) and were called "Pennsylvania high-test" or simply "high-test" gasolines. These were often used in aircraft engines.

By 1910, increased automobile production and the resultant increase in gasoline consumption produced a greater demand for gasoline. Also, the growing electrification of lighting produced a drop in kerosene demand, creating a supply problem. It appeared that the burgeoning oil industry would be trapped into over-producing kerosene and under-producing gasoline since simple distillation could not alter the ratio of the two products from any given crude. The solution appeared in 1911 when the development of the

thermal cracking of crude oils, which increased the percent yield of gasoline from the heavier hydrocarbons. This was combined with the expansion of foreign markets for the export of surplus kerosene which domestic markets no longer needed. These new thermally "cracked" gasolines were believed to have no harmful effects and would be added to straight-run gasolines. There also was the practice of mixing heavy and light distillates to achieve the desired Baumé reading and collectively these were called "blended" gasolines.[33]

Gradually, volatility gained favor over the Baumé test, though both continued to be used in combination to specify a gasoline. As late as June 1917, Standard Oil (the largest refiner of crude oil in the United States at the time) stated that the most important property of a gasoline was its volatility.[34] It is estimated that the rating equivalent of these straight-run gasolines varied from 40 to 60 octane and that the "high-test", sometimes referred to as "fighting grade", probably averaged 50 to 65 octane.[35]

World War I

Prior to the

United States entry into World War I, the European Allies used fuels derived from crude oils from Borneo, Java, and Sumatra, which gave satisfactory performance in their military aircraft. When the U.S. entered the war in April 1917, the U.S. became the principal supplier of aviation gasoline to the Allies and a decrease in engine performance was noted.[36] Soon it was realized that motor vehicle fuels were unsatisfactory for aviation, and after the loss of several combat aircraft, attention turned to the quality of the gasolines being used. Later flight tests conducted in 1937 showed that an octane reduction of 13 points (from 100 down to 87 octane) decreased engine performance by 20 percent and increased take-off distance by 45 percent.[37]
If abnormal combustion were to occur, the engine could lose enough power to make getting airborne impossible and a take-off roll became a threat to the pilot and aircraft.

On 2 August 1917, the

U.S. Army Signal Corps and a general survey concluded that no reliable data existed for the proper fuels for aircraft. As a result, flight tests began at Langley, McCook and Wright fields to determine how different gasolines performed under different conditions. These tests showed that in certain aircraft, motor vehicle gasolines performed as well as "high-test" but in other types resulted in hot-running engines. It was also found that gasolines from aromatic and naphthenic base crude oils from California, South Texas, and Venezuela resulted in smooth-running engines. These tests resulted in the first government specifications for motor gasolines (aviation gasolines used the same specifications as motor gasolines) in late 1917.[38]

U.S., 1918–1929

Engine designers knew that, according to the Otto cycle, power and efficiency increased with compression ratio, but experience with early gasolines during World War I showed that higher compression ratios increased the risk of abnormal combustion, producing lower power, lower efficiency, hot-running engines, and potentially severe engine damage. To compensate for these poor fuels, early engines used low compression ratios, which required relatively large, heavy engines with limited power and efficiency. The Wright brothers' first gasoline engine used a compression ratio as low as 4.7-to-1, developed only 8.9 kilowatts (12 hp) from 3,290 cubic centimeters (201 cu in), and weighed 82 kilograms (180 lb).[39][40] This was a major concern for aircraft designers and the needs of the aviation industry provoked the search for fuels that could be used in higher-compression engines.

Between 1917 and 1919, the amount of thermally cracked gasoline utilized almost doubled. Also, the use of natural gasoline increased greatly. During this period, many U.S. states established specifications for motor gasoline but none of these agreed and they were unsatisfactory from one standpoint or another. Larger oil refiners began to specify unsaturated material percentage (thermally cracked products caused gumming in both use and storage while unsaturated hydrocarbons are more reactive and tend to combine with impurities leading to gumming). In 1922, the U.S. government published the first specifications for aviation gasolines (two grades were designated as "fighting" and "domestic" and were governed by boiling points, color, sulfur content, and a gum formation test) along with one "motor" grade for automobiles. The gum test essentially eliminated thermally cracked gasoline from aviation usage and thus aviation gasolines reverted to fractionating straight-run naphthas or blending straight-run and highly treated thermally cracked naphthas. This situation persisted until 1929.[41]

The automobile industry reacted to the increase in thermally cracked gasoline with alarm. Thermal cracking produced large amounts of both

diolefins (unsaturated hydrocarbons), which increased the risk of gumming.[42] Also, the volatility was decreasing to the point that fuel did not vaporize and was sticking to spark plugs and fouling them, creating hard starting and rough running in winter and sticking to cylinder walls, bypassing the pistons and rings, and going into the crankcase oil.[43] One journal stated, "on a multi-cylinder engine in a high-priced car we are diluting the oil in the crankcase as much as 40 percent in a 200-mile [320 km] run, as the analysis of the oil in the oil-pan shows".[44]

Being very unhappy with the consequent reduction in overall gasoline quality, automobile manufacturers suggested imposing a quality standard on the oil suppliers. The oil industry in turn accused the automakers of not doing enough to improve vehicle economy, and the dispute became known within the two industries as "the fuel problem". Animosity grew between the industries, each accusing the other of not doing anything to resolve matters, and their relationship deteriorated. The situation was only resolved when the

U.S. Bureau of Standards being chosen as an impartial research organization to carry out many of the studies. Initially, all the programs were related to volatility and fuel consumption, ease of starting, crankcase oil dilution, and acceleration.[45]

Leaded gasoline controversy, 1924–1925

With the increased use of thermally cracked gasolines came an increased concern regarding its effects on abnormal combustion, and this led to research for antiknock additives. In the late 1910s, researchers such as A.H. Gibson, Harry Ricardo, Thomas Midgley Jr., and Thomas Boyd began to investigate abnormal combustion. Beginning in 1916, Charles F. Kettering of General Motors began investigating additives based on two paths, the "high percentage" solution (where large quantities of ethanol were added) and the "low percentage" solution (where only 0.53-1.1 g/L or 0.071-0.147 oz / U.S. gal were needed). The "low percentage" solution ultimately led to the discovery of tetraethyllead (TEL) in December 1921, a product of the research of Midgley and Boyd and the defining component of leaded gasoline. This innovation started a cycle of improvements in fuel efficiency that coincided with the large-scale development of oil refining to provide more products in the boiling range of gasoline. Ethanol could not be patented but TEL could, so Kettering secured a patent for TEL and began promoting it instead of other options.

The dangers of compounds containing lead were well-established by then and Kettering was directly warned by Robert Wilson of MIT, Reid Hunt of Harvard, Yandell Henderson of Yale, and Erik Krause of the University of Potsdam in Germany about its use. Krause had worked on tetraethyllead for many years and called it "a creeping and malicious poison" that had killed a member of his dissertation committee.[46][47] On 27 October 1924, newspaper articles around the nation told of the workers at the Standard Oil refinery near Elizabeth, New Jersey who were producing TEL and were suffering from lead poisoning. By 30 October, the death toll had reached five.[47] In November, the New Jersey Labor Commission closed the Bayway refinery and a grand jury investigation was started which had resulted in no charges by February 1925. Leaded gasoline sales were banned in New York City, Philadelphia, and New Jersey. General Motors, DuPont, and Standard Oil, who were partners in Ethyl Corporation, the company created to produce TEL, began to argue that there were no alternatives to leaded gasoline that would maintain fuel efficiency and still prevent engine knocking. After several industry-funded flawed studies reported that TEL-treated gasoline was not a public health issue, the controversy subsided.[47]

U.S., 1930–1941

In the five years prior to 1929, a great amount of experimentation was conducted on different testing methods for determining fuel resistance to abnormal combustion. It appeared engine knocking was dependent on a wide variety of parameters including compression, ignition timing, cylinder temperature, air-cooled or water-cooled engines, chamber shapes, intake temperatures, lean or rich mixtures, and others. This led to a confusing variety of test engines that gave conflicting results, and no standard rating scale existed. By 1929, it was recognized by most aviation gasoline manufacturers and users that some kind of antiknock rating must be included in government specifications. In 1929, the

U.S. Army Air Force specified fuels rated at 87 octane for its aircraft as a result of studies it had conducted.[48]

During this period, research showed that hydrocarbon structure was extremely important to the antiknocking properties of fuel. Straight-chain

isooctane", which became an important component in aviation fuel blending. To further complicate the situation, as engine performance increased, the altitude that aircraft could reach also increased, which resulted in concerns about the fuel freezing. The average temperature decrease is 3.6 °F (2.0 °C) per 300-meter (1,000 ft) increase in altitude, and at 12,000 meters (40,000 ft), the temperature can approach −57 °C (−70 °F). Additives like benzene, with a freezing point of 6 °C (42 °F), would freeze in the gasoline and plug fuel lines. Substituted aromatics such as toluene, xylene, and cumene, combined with limited benzene, solved the problem.[50]

By 1935, there were seven different aviation grades based on octane rating, two Army grades, four Navy grades, and three commercial grades including the introduction of 100-octane aviation gasoline. By 1937, the Army established 100-octane as the standard fuel for combat aircraft, and to add to the confusion, the government now recognized 14 different grades, in addition to 11 others in foreign countries. With some companies required to stock 14 grades of aviation fuel, none of which could be interchanged, the effect on the refiners was negative. The refining industry could not concentrate on large capacity conversion processes for so many different grades and a solution had to be found. By 1941, principally through the efforts of the Cooperative Fuel Research Committee, the number of grades for aviation fuels was reduced to three: 73, 91, and 100 octane.[51]

The development of 100-octane aviation gasoline on an economic scale was due in part to Jimmy Doolittle, who had become Aviation Manager of Shell Oil Company. He convinced Shell to invest in refining capacity to produce 100-octane on a scale that nobody needed since no aircraft existed that required a fuel that nobody made. Some fellow employees would call his effort "Doolittle's million-dollar blunder" but time would prove Doolittle correct. Before this, the Army had considered 100-octane tests using pure octane but at $6.6 per liter ($25/U.S. gal), the price prevented this from happening. In 1929, Stanavo Specification Board Inc. was organized by the Standard Oil companies of California, Indiana, and New Jersey to improve aviation fuels and oils and by 1935 had placed their first 100 octane fuel on the market, Stanavo Ethyl Gasoline 100. It was used by the Army, engine manufacturers and airlines for testing and for air racing and record flights.[52] By 1936, tests at Wright Field using the new, cheaper alternatives to pure octane proved the value of 100 octane fuel, and both Shell and Standard Oil would win the contract to supply test quantities for the Army. By 1938, the price was down to $0.046 per liter ($0.175/U.S. gal), only $0.0066 ($0.025) more than 87 octane fuel. By the end of WWII, the price would be down to $0.042 per liter ($0.16/U.S. gal).[53]

In 1937,

catalytic cracking, which produced a high-octane base stock of gasoline which was superior to the thermally cracked product since it did not contain the high concentration of olefins.[33] In 1940, there were only 14 Houdry units in operation in the U.S.; by 1943, this had increased to 77, either of the Houdry process or of the Thermofor Catalytic or Fluid Catalyst type.[54]

The search for fuels with octane ratings above 100 led to the extension of the scale by comparing power output. A fuel designated grade 130 would produce 130 percent as much power in an engine as it would running on pure iso-octane. During WWII, fuels above 100-octane were given two ratings, a rich and a lean mixture, and these would be called 'performance numbers' (PN). 100-octane aviation gasoline would be referred to as 130/100 grade.[55]

World War II

Germany

Oil and its byproducts, especially high-octane aviation gasoline, would prove to be a driving concern for how Germany conducted the war. As a result of the lessons of World War I, Germany had stockpiled oil and gasoline for its

Panzer divisions consumed nearly 2.4 liters per kilometer (1 U.S. gal/mi) of gasoline on the drive to Vienna. When they were engaged in combat across open country, gasoline consumption almost doubled. On the second day of battle, a unit of the XIX Corps was forced to halt when it ran out of gasoline.[56] One of the major objectives of the Polish invasion was their oil fields but the Soviets invaded and captured 70 percent of the Polish production before the Germans could reach it. Through the German–Soviet Commercial Agreement (1940)
, Stalin agreed in vague terms to supply Germany with additional oil equal to that produced by now Soviet-occupied Polish oilfields at Drohobych and Boryslav in exchange for hard coal and steel tubing.

Even after the Nazis conquered the vast territories of Europe, this did not help the gasoline shortage. This area had never been self-sufficient in oil before the war. In 1938, the area that would become Nazi-occupied produced 575,000 barrels (91,400 m3; 3,230,000 cu ft) per day. In 1940, total production under German control amounted to only 234,550 barrels (37,290 m3; 1,316,900 cu ft).[57] By early 1941 and the depletion of German gasoline reserves, Adolf Hitler saw the invasion of Russia to seize the Polish oil fields and the Russian oil in the Caucasus as the solution to the German gasoline shortage. As early as July 1941, following the 22 June start of Operation Barbarossa, certain Luftwaffe squadrons were forced to curtail ground support missions due to shortages of aviation gasoline. On 9 October, the German quartermaster general estimated that army vehicles were 24,000 barrels (3,800 m3; 130,000 cu ft) short of gasoline requirements.[58]

Virtually all of Germany's aviation gasoline came from synthetic oil plants that hydrogenated coals and coal tars. These processes had been developed during the 1930s as an effort to achieve fuel independence. There were two grades of aviation gasoline produced in volume in Germany, the B-4 or blue grade and the C-3 or green grade, which accounted for about two-thirds of all production. B-4 was equivalent to 89-octane and the C-3 was roughly equal to the U.S. 100-octane, though lean mixture was rated around 95-octane and was poorer than the U.S. version. Maximum output achieved in 1943 reached 52,200 barrels (8,300 m3; 293,000 cu ft) a day before the Allies decided to target the synthetic fuel plants. Through captured enemy aircraft and analysis of the gasoline found in them, both the Allies and the Axis powers were aware of the quality of the aviation gasoline being produced and this prompted an octane race to achieve the advantage in aircraft performance. Later in the war, the C-3 grade was improved to where it was equivalent to the U.S. 150 grade (rich mixture rating).[59]

Japan

Japan, like Germany, had almost no domestic oil supply and by the late 1930s, produced only seven percent of its own oil while importing the rest – 80 percent from the U.S.. As Japanese aggression grew in China (

Battle of the Netherlands. This action prompted the U.S. to move its Pacific fleet from Southern California to Pearl Harbor to help stiffen British resolve to stay in Indochina. With the Japanese invasion of French Indochina in September 1940, came great concerns about the possible Japanese invasion of the Dutch Indies to secure their oil. After the U.S. banned all exports of steel and iron scrap, the next day, Japan signed the Tripartite Pact and this led Washington to fear that a complete U.S. oil embargo would prompt the Japanese to invade the Dutch East Indies. On 16 June 1941 Harold Ickes, who was appointed Petroleum Coordinator for National Defense, stopped a shipment of oil from Philadelphia to Japan in light of the oil shortage on the East coast due to increased exports to Allies. He also telegrammed all oil suppliers on the East coast not to ship any oil to Japan without his permission. President Roosevelt countermanded Ickes's orders telling Ickes that the "I simply have not got enough Navy to go around and every little episode in the Pacific means fewer ships in the Atlantic".[61]
On 25 July 1941, the U.S. froze all Japanese financial assets and licenses would be required for each use of the frozen funds including oil purchases that could produce aviation gasoline. On 28 July 1941, Japan invaded southern Indochina.

The debate inside the Japanese government as to its oil and gasoline situation was leading to invasion of the Dutch East Indies but this would mean war with the U.S., whose Pacific fleet was a threat to their flank. This situation led to the decision to attack the U.S. fleet at Pearl Harbor before proceeding with the Dutch East Indies invasion. On 7 December 1941, Japan attacked Pearl Harbor, and the next day the Netherlands declared war on Japan, which initiated the Dutch East Indies campaign. But the Japanese missed a golden opportunity at Pearl Harbor. "All of the oil for the fleet was in surface tanks at the time of Pearl Harbor", Admiral Chester Nimitz, who became Commander in Chief of the Pacific Fleet, was later to say. "We had about 4+12 million barrels [0.72×10^6 m3; 25×10^6 cu ft] of oil out there and all of it was vulnerable to .50 caliber bullets. Had the Japanese destroyed the oil," he added, "it would have prolonged the war another two years."[62]

U.S.

Early in 1944, William Boyd, president of the American Petroleum Institute and chairman of the Petroleum Industry War Council said: "The Allies may have floated to victory on a wave of oil in World War I, but in this infinitely greater World War II, we are flying to victory on the wings of petroleum". In December 1941 the U.S. had 385,000 oil wells producing 1.6 billion barrels (0.25×10^9 m3; 9.0×10^9 cu ft) barrels of oil a year and 100-octane aviation gasoline capacity was at 40,000 barrels (6,400 m3; 220,000 cu ft) a day. By 1944, the U.S. was producing over 1.5 billion barrels (0.24×10^9 m3; 8.4×10^9 cu ft) a year (67 percent of world production) and the petroleum industry had built 122 new plants for the production of 100-octane aviation gasoline and capacity was over 400,000 barrels (64,000 m3; 2,200,000 cu ft) a day – an increase of more than ten-fold. It was estimated that the U.S. was producing enough 100-octane aviation gasoline to permit the dropping of 16,000 metric tons (18,000 short tons; 16,000 long tons) of bombs on the enemy every day of the year. The record of gasoline consumption by the Army prior to June 1943 was uncoordinated as each supply service of the Army purchased its own petroleum products and no centralized system of control nor records existed. On 1 June 1943, the Army created the Fuels and Lubricants Division of the Quartermaster Corps, and, from their records, they tabulated that the Army (excluding fuels and lubricants for aircraft) purchased over 9.1 billion liters (2.4×10^9 U.S. gal) of gasoline for delivery to overseas theaters between 1 June 1943 through August 1945. That figure does not include gasoline used by the Army inside the U.S.[63] Motor fuel production had declined from 701 million barrels (111.5×10^6 m3; 3,940×10^6 cu ft)in 1941 down to 208 million barrels (33.1×10^6 m3; 1,170×10^6 cu ft) in 1943.[64] World War II marked the first time in U.S. history that gasoline was rationed and the government imposed price controls to prevent inflation. Gasoline consumption per automobile declined from 2,860 liters (755 U.S. gal) per year in 1941 down to 2,000 liters (540 U.S. gal)in 1943, with the goal of preserving rubber for tires since the Japanese had cut the U.S. off from over 90 percent of its rubber supply which had come from the Dutch East Indies and the U.S. synthetic rubber industry was in its infancy. Average gasoline prices went from a record low of $0.0337 per liter ($0.1275/U.S. gal) ($0.0486 ($0.1841) with taxes) in 1940 to $0.0383 per liter ($0.1448/U.S. gal) ($0.0542 ($0.2050) with taxes) in 1945.[65]

Even with the world's largest aviation gasoline production, the U.S. military still found that more was needed. Throughout the duration of the war, aviation gasoline supply was always behind requirements and this impacted training and operations. The reason for this shortage developed before the war even began. The free market did not support the expense of producing 100-octane aviation fuel in large volume, especially during the Great Depression. Iso-octane in the early development stage cost $7.9 per liter ($30/U.S. gal), and, even by 1934, it was still $0.53 per liter ($2/U.S. gal)compared to $0.048 ($0.18) for motor gasoline when the Army decided to experiment with 100-octane for its combat aircraft. Though only three percent of U.S. combat aircraft in 1935 could take full advantage of the higher octane due to low compression ratios, the Army saw that the need for increasing performance warranted the expense and purchased 100,000 gallons. By 1937, the Army established 100-octane as the standard fuel for combat aircraft and by 1939 production was only 20,000 barrels (3,200 m3; 110,000 cu ft) a day. In effect, the U.S. military was the only market for 100-octane aviation gasoline and as war broke out in Europe this created a supply problem that persisted throughout the duration.[66][67]

With the war in Europe a reality in 1939, all predictions of 100-octane consumption were outrunning all possible production. Neither the Army nor the Navy could contract more than six months in advance for fuel and they could not supply the funds for plant expansion. Without a long-term guaranteed market, the petroleum industry would not risk its capital to expand production for a product that only the government would buy. The solution to the expansion of storage, transportation, finances, and production was the creation of the Defense Supplies Corporation on 19 September 1940. The Defense Supplies Corporation would buy, transport and store all aviation gasoline for the Army and Navy at cost plus a carrying fee.[68]

When the Allied breakout after D-Day found their armies stretching their supply lines to a dangerous point, the makeshift solution was the Red Ball Express. But even this soon was inadequate. The trucks in the convoys had to drive longer distances as the armies advanced and they were consuming a greater percentage of the same gasoline they were trying to deliver. In 1944, General George Patton's Third Army finally stalled just short of the German border after running out of gasoline. The general was so upset at the arrival of a truckload of rations instead of gasoline he was reported to have shouted: "Hell, they send us food, when they know we can fight without food but not without oil."[69] The solution had to wait for the repairing of the railroad lines and bridges so that the more efficient trains could replace the gasoline-consuming truck convoys.

U.S., 1946–present

The development of jet engines burning kerosene-based fuels during WWII for aircraft produced a superior performing propulsion system than internal combustion engines could offer and the U.S. military forces gradually replaced their piston combat aircraft with jet powered planes. This development would essentially remove the military need for ever increasing octane fuels and eliminated government support for the refining industry to pursue the research and production of such exotic and expensive fuels. Commercial aviation was slower to adapt to jet propulsion and until 1958, when the Boeing 707 first entered commercial service, piston powered airliners still relied on aviation gasoline. But commercial aviation had greater economic concerns than the maximum performance that the military could afford. As octane numbers increased so did the cost of gasoline but the incremental increase in efficiency becomes less as compression ratio goes up. This reality set a practical limit to how high compression ratios could increase relative to how expensive the gasoline would become.[70] Last produced in 1955, the Pratt & Whitney R-4360 Wasp Major was using 115/145 Aviation gasoline and producing 0.046 kilowatts per cubic centimeter (1 hp/cu in) at 6.7 compression ratio (turbo-supercharging would increase this) and 0.45 kilograms (1 lb) of engine weight to produce 0.82 kilowatts (1.1 hp). This compares to the Wright Brothers engine needing almost 7.7 kilograms (17 lb) of engine weight to produce 0.75 kilowatts (1 hp).

The U.S. automobile industry after WWII could not take advantage of the high octane fuels then available. Automobile compression ratios increased from an average of 5.3-to-1 in 1931 to just 6.7-to-1 in 1946. The average octane number of regular-grade motor gasoline increased from 58 to 70 during the same time. Military aircraft were using expensive turbo-supercharged engines that cost at least 10 times as much per horsepower as automobile engines and had to be overhauled every 700 to 1,000 hours. The automobile market could not support such expensive engines.[71] It would not be until 1957 that the first U.S. automobile manufacturer could mass-produce an engine that would produce one horsepower per cubic inch, the Chevrolet 283 hp/283 cubic inch V-8 engine option in the Corvette. At $485, this was an expensive option that few consumers could afford and would only appeal to the performance-oriented consumer market willing to pay for the premium fuel required.[72] This engine had an advertised compression ratio of 10.5-to-1 and the 1958 AMA Specifications stated that the octane requirement was 96–100 RON.[73] At 243 kilograms (535 lb) (1959 with aluminum intake), it took 0.86 kilograms (1.9 lb) of engine weight to make 0.75 kilowatts (1 hp).[74]

In the 1950s, oil refineries started to focus on high octane fuels, and then detergents were added to gasoline to clean the jets in carburetors. The 1970s witnessed greater attention to the environmental consequences of burning gasoline. These considerations led to the phasing out of TEL and its replacement by other antiknock compounds. Subsequently, low-sulfur gasoline was introduced, in part to preserve the catalysts in modern exhaust systems.[75]

Chemical analysis and production

MTBE
A pumpjack in the United States
An oil rig in the Gulf of Mexico

Commercial gas is a mixture of a large number of different hydro-carbons.[76] Chemical Gasoline is produced to meet a number of engine performance specifications and many different compositions are possible. Hence, the exact chemical composition of gasoline is undefined. The performance specification also varies with season, requiring more volatile blends (due to added butane) during winter, in order to be able to start a cold engine. At the refinery, the composition varies according to the crude oils from which it is produced, the type of processing units present at the refinery, how those units are operated, and which hydrocarbon streams (blendstocks) the refinery opts to use when blending the final product.[77]

Gasoline is produced in

crude oil.[78] Material separated from crude oil via distillation, called virgin or straight-run gasoline, does not meet specifications for modern engines (particularly the octane rating
; see below), but can be pooled to the gasoline blend.

The bulk of a typical gasoline consists of a homogeneous mixture of small, relatively lightweight hydrocarbons with between 4 and 12 carbon atoms per molecule (commonly referred to as C4–C12).[75] It is a mixture of paraffins (alkanes), olefins (alkenes), and napthenes (cycloalkanes). The use of the term paraffin in place of the standard chemical nomenclature alkane is particular to the oil industry. The actual ratio of molecules in any gasoline depends upon:

  • the oil refinery that makes the gasoline, as not all refineries have the same set of processing units;
  • the
    crude oil
    feed used by the refinery;
  • the grade of gasoline (in particular, the octane rating).

The various refinery streams blended to make gasoline have different characteristics. Some important streams include the following:

  • Straight-run gasoline, sometimes referred to as
    isomerization
    . However, before feeding those units, the naphtha needs to be split into light and heavy naphtha. Straight-run gasoline can also be used as a feedstock for steam-crackers to produce olefins.
  • Reformate, produced in a
    catalytic reformer, has a high octane rating with high aromatic content and relatively low olefin content. Most of the benzene, toluene, and xylene (the so-called BTX
    hydrocarbons) are more valuable as chemical feedstocks and are thus removed to some extent.
  • Catalytic cracked gasoline, or catalytic cracked naphtha, produced with a catalytic cracker, has a moderate octane rating, high olefin content, and moderate aromatic content.
  • Hydrocrackate (heavy, mid, and light), produced with a
    hydrocracker
    , has a medium to low octane rating and moderate aromatic levels.
  • Alkylate is produced in an
    Motor Octane Number
    ).
  • Isomerate is obtained by isomerizing low-octane straight-run gasoline into iso-paraffins (non-chain alkanes, such as
    isooctane
    ). Isomerate has a medium RON and MON, but no aromatics or olefins.
  • Butane is usually blended in the gasoline pool, although the quantity of this stream is limited by the RVP specification.

The terms above are the jargon used in the oil industry, and the terminology varies.

Currently, many countries set limits on gasoline

aromatics in general, benzene in particular, and olefin (alkene) content. Such regulations have led to an increasing preference for alkane isomers, such as isomerate or alkylate, as their octane rating is higher than n-alkanes. In the European Union, the benzene limit is set at one percent by volume for all grades of automotive gasoline. This is usually achieved by avoiding feeding C6, in particular cyclohexane, to the reformer unit, where it would be converted to benzene. Therefore, only (desulfurized) heavy virgin naphtha (HVN) is fed to the reformer unit[77]

Gasoline can also contain other

organosulfur
compounds (which are usually removed at the refinery).

Physical properties

Density

The

specific gravity of gasoline ranges from 0.71 to 0.77,[79] with higher densities having a greater volume fraction of aromatics.[80] Finished marketable gasoline is traded (in Europe) with a standard reference of 0.755 kilograms per liter (6.30 lb/U.S. gal), and its price is escalated or de-escalated according to its actual density.[clarification needed
] Because of its low density, gasoline floats on water, and therefore water cannot generally be used to extinguish a gasoline fire unless applied in a fine mist.

Stability

Quality gasoline should be

oxidation or water vapor mixing in with the gas) that can withstand the vapor pressure
of the gasoline without venting (to prevent the loss of the more volatile fractions) at a stable cool temperature (to reduce the excess pressure from liquid expansion and to reduce the rate of any decomposition reactions). When gasoline is not stored correctly, gums and solids may result, which can corrode system components and accumulate on wet surfaces, resulting in a condition called "stale fuel". Gasoline containing ethanol is especially subject to absorbing atmospheric moisture, then forming gums, solids, or two phases (a hydrocarbon phase floating on top of a water-alcohol phase).

The presence of these degradation products in the fuel tank or fuel lines plus a carburetor or fuel injection components makes it harder to start the engine or causes reduced engine performance. On resumption of regular engine use, the buildup may or may not be eventually cleaned out by the flow of fresh gasoline. The addition of a fuel stabilizer to gasoline can extend the life of fuel that is not or cannot be stored properly, though removal of all fuel from a fuel system is the only real solution to the problem of long-term storage of an engine or a machine or vehicle. Typical fuel stabilizers are proprietary mixtures containing

other additives. Fuel stabilizers are commonly used for small engines, such as lawnmower and tractor engines, especially when their use is sporadic or seasonal (little to no use for one or more seasons of the year). Users have been advised to keep gasoline containers more than half full and properly capped to reduce air exposure, to avoid storage at high temperatures, to run an engine for ten minutes to circulate the stabilizer through all components prior to storage, and to run the engine at intervals to purge stale fuel from the carburetor.[75]

Gasoline stability requirements are set by the standard ASTM D4814. This standard describes the various characteristics and requirements of automotive fuels for use over a wide range of operating conditions in ground vehicles equipped with spark-ignition engines.

Combustion energy content

A gasoline-fueled internal combustion engine obtains energy from the combustion of gasoline's various hydrocarbons with oxygen from the ambient air, yielding carbon dioxide and water as exhaust. The combustion of octane, a representative species, performs the chemical reaction:

2 C8H18 + 25 O2 → 16 CO2 + 18 H2O

By weight, combustion of gasoline releases about 46.7

lower heating value.[81] Gasoline blends differ, and therefore actual energy content varies according to the season and producer by up to 1.75 percent more or less than the average.[82] On average, about 74 liters (20 U.S. gal) of gasoline are available from a barrel of crude oil (about 46 percent by volume), varying with the quality of the crude and the grade of the gasoline. The remainder is products ranging from tar to naphtha.[83]

A high-octane-rated fuel, such as liquefied petroleum gas (LPG), has an overall lower power output at the typical 10:1 compression ratio of an engine design optimized for gasoline fuel. An engine tuned for LPG fuel via higher compression ratios (typically 12:1) improves the power output. This is because higher-octane fuels allow for a higher compression ratio without knocking, resulting in a higher cylinder temperature, which improves efficiency. Also, increased mechanical efficiency is created by a higher compression ratio through the concomitant higher expansion ratio on the power stroke, which is by far the greater effect. The higher expansion ratio extracts more work from the high-pressure gas created by the combustion process. An Atkinson cycle engine uses the timing of the valve events to produce the benefits of a high expansion ratio without the disadvantages, chiefly detonation, of a high compression ratio. A high expansion ratio is also one of the two key reasons for the efficiency of diesel engines, along with the elimination of pumping losses due to throttling of the intake airflow.

The lower energy content of LPG by liquid volume in comparison to gasoline is due mainly to its lower density. This lower density is a property of the lower

molecular weight of propane (LPG's chief component) compared to gasoline's blend of various hydrocarbon compounds with heavier molecular weights than propane. Conversely, LPG's energy content by weight is higher than gasoline's due to a higher hydrogen-to-carbon
ratio.

Molecular weights of the species in the representative octane combustion are 114, 32, 44, and 18 for C8H18, O2, CO2, and H2O, respectively; therefore one kilogram (2.2 lb) of fuel reacts with 3.51 kilograms (7.7 lb) of oxygen to produce 3.09 kilograms (6.8 lb) of carbon dioxide and 1.42 kilograms (3.1 lb) of water.

Octane rating

Spark-ignition engines are designed to burn gasoline in a controlled process called deflagration. However, the unburned mixture may autoignite by pressure and heat alone, rather than igniting from the spark plug at exactly the right time, causing a rapid pressure rise that can damage the engine. This is often referred to as engine knocking or end-gas knock. Knocking can be reduced by increasing the gasoline's resistance to autoignition, which is expressed by its octane rating.

Octane rating is measured relative to a mixture of 2,2,4-trimethylpentane (an isomer of octane) and n-heptane. There are different conventions for expressing octane ratings, so the same physical fuel may have several different octane ratings based on the measure used. One of the best known is the research octane number (RON).

The octane rating of typical commercially available gasoline varies by country. In Finland, Sweden, and Norway, 95 RON is the standard for regular unleaded gasoline and 98 RON is also available as a more expensive option.

In the United Kingdom, over 95 percent of gasoline sold has 95 RON and is marketed as Unleaded or Premium Unleaded. Super Unleaded, with 97/98 RON and branded high-performance fuels (e.g., Shell V-Power, BP Ultimate) with 99 RON make up the balance. Gasoline with 102 RON may rarely be available for racing purposes.[84][85][86]

In the U.S., octane ratings in unleaded fuels vary between 85[87] and 87 AKI (91–92 RON) for regular, 89–90 AKI (94–95 RON) for mid-grade (equivalent to European regular), up to 90–94 AKI (95–99 RON) for premium (European premium).

91 92 93 94 95 96 97 98 99 100 101 102
Scandinavian Regular Premium
UK Regular Premium Super High-performance
USA Regular Mid-grade Premium

As South Africa's largest city, Johannesburg, is located on the Highveld at 1,753 meters (5,751 ft) above sea level, the Automobile Association of South Africa recommends 95-octane gasoline at low altitude and 93-octane for use in Johannesburg because "The higher the altitude the lower the air pressure, and the lower the need for a high octane fuel as there is no real performance gain".[88]

Octane rating became important as the military sought higher output for aircraft engines in the late 1920s and the 1940s. A higher octane rating allows a higher compression ratio or supercharger boost, and thus higher temperatures and pressures, which translate to higher power output. Some scientists[who?] even predicted that a nation with a good supply of high-octane gasoline would have the advantage in air power. In 1943, the Rolls-Royce Merlin aero engine produced 980 kilowatts (1,320 hp) using 100 RON fuel from a modest 27 liters (1,600 cu in) displacement. By the time of Operation Overlord, both the RAF and USAAF were conducting some operations in Europe using 150 RON fuel (100/150 avgas), obtained by adding 2.5 percent aniline to 100-octane avgas.[89] By this time, the Rolls-Royce Merlin 66 was developing 1,500 kilowatts (2,000 hp) using this fuel.

Additives

Antiknock additives

Tetraethyl lead

Gasoline, when used in high-

compression internal combustion engines, tends to auto-ignite or "detonate" causing damaging engine knocking (also called "pinging" or "pinking"). To address this problem, tetraethyl lead (TEL) was widely adopted as an additive for gasoline in the 1920s. With a growing awareness of the seriousness of the extent of environmental and health damage caused by lead compounds, however, and the incompatibility of lead with catalytic converters
, governments began to mandate reductions in gasoline lead.

In the U.S., the

Environmental Protection Agency issued regulations to reduce the lead content of leaded gasoline over a series of annual phases, scheduled to begin in 1973 but delayed by court appeals until 1976. By 1995, leaded fuel accounted for only 0.6 percent of total gasoline sales and under 1,800 metric tons (2,000 short tons; 1,800 long tons) of lead per year. From 1 January 1996, the U.S. Clean Air Act banned the sale of leaded fuel for use in on-road vehicles in the U.S. The use of TEL also necessitated other additives, such as dibromoethane
.

European countries began replacing lead-containing additives by the end of the 1980s, and by the end of the 1990s, leaded gasoline was banned within the entire European Union. The UAE started to switch to unleaded in the early 2000s.[90]

Reduction in the average lead content of human blood may be a major cause for falling violent crime rates around the world[91] including South Africa.[92] A study found a correlation between leaded gasoline usage and violent crime (see Lead–crime hypothesis).[93][94] Other studies found no correlation.

In August 2021, the

100LL
, because the required octane rating is difficult to reach without the use of leaded additives.

Different additives have replaced lead compounds. The most popular additives include

alcohols, most commonly ethanol
.

Lead Replacement Petrol

Lead replacement petrol (LRP) was developed for vehicles designed to run on leaded fuels and incompatible with unleaded fuels. Rather than tetraethyllead, it contains other metals such as potassium compounds or methylcyclopentadienyl manganese tricarbonyl (MMT); these are purported to buffer soft exhaust valves and seats so that they do not suffer recession due to the use of unleaded fuel.

LRP was marketed during and after the phaseout of leaded motor fuels in the United Kingdom, Australia, South Africa, and some other countries.[vague] Consumer confusion led to a widespread mistaken preference for LRP rather than unleaded,[97] and LRP was phased out 8 to 10 years after the introduction of unleaded.[98]

Leaded gasoline was withdrawn from sale in Britain after 31 December 1999, seven years after EEC regulations signaled the end of production for cars using leaded gasoline in member states. At this stage, a large percentage of cars from the 1980s and early 1990s which ran on leaded gasoline were still in use, along with cars that could run on unleaded fuel. However, the declining number of such cars on British roads saw many gasoline stations withdrawing LRP from sale by 2003.[99]

MMT

Methylcyclopentadienyl manganese tricarbonyl (MMT) is used in Canada and the U.S. to boost octane rating.[100] Its use in the U.S. has been restricted by regulations, although it is currently allowed.[101] Its use in the European Union is restricted by Article 8a of the Fuel Quality Directive[102] following its testing under the Protocol for the evaluation of effects of metallic fuel-additives on the emissions performance of vehicles.[103]

Fuel stabilizers (antioxidants and metal deactivators)

Substituted phenols and derivatives of phenylenediamine are common antioxidants used to inhibit gum formation in gasoline

Gummy, sticky resin deposits result from

oxidative degradation of gasoline during long-term storage. These harmful deposits arise from the oxidation of alkenes and other minor components in gasoline[citation needed] (see drying oils). Improvements in refinery techniques have generally reduced the susceptibility of gasolines to these problems. Previously, catalytically or thermally cracked gasolines were most susceptible to oxidation. The formation of gums is accelerated by copper salts, which can be neutralized by additives called metal deactivators
.

This degradation can be prevented through the addition of 5–100 ppm of

organic peroxides produced by oxidation of the gasoline.[104]

Gasolines are also treated with metal deactivators, which are compounds that sequester (deactivate) metal salts that otherwise accelerate the formation of gummy residues. The metal impurities might arise from the engine itself or as contaminants in the fuel.

Detergents

Gasoline, as delivered at the pump, also contains additives to reduce internal engine carbon buildups, improve

EPA requirement is not sufficient to keep engines clean.[105] Typical detergents include alkylamines and alkyl phosphates at a level of 50–100 ppm.[75]

Ethanol

Corn vs Ethanol production in the United States
  Total corn production (bushels) (left)
  Corn used for Ethanol fuel (bushels) (left)
  Percent of corn used for Ethanol (right)

European Union

In the EU, 5 percent

hydrous ethanol (i.e., the ethanol–water azeotrope
) instead of the anhydrous ethanol traditionally used for blending with gasoline.

Brazil

The

Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP) requires gasoline for automobile use to have 27.5 percent of ethanol added to its composition.[106]
Pure hydrated ethanol is also available as a fuel.

Australia

Legislation requires retailers to label fuels containing ethanol on the dispenser, and limits ethanol use to 10 percent of gasoline in Australia. Such gasoline is commonly called E10 by major brands, and it is cheaper than regular unleaded gasoline.

U.S.

The federal

gasoline consumption have caused the typical ethanol content in gasoline to approach 10 percent. Most fuel pumps display a sticker that states that the fuel may contain up to 10 percent ethanol, an intentional disparity that reflects the varying actual percentage. Until late 2010, fuel retailers were only authorized to sell fuel containing up to 10 percent ethanol (E10), and most vehicle warranties (except for flexible fuel vehicles) authorize fuels that contain no more than 10 percent ethanol.[citation needed
] In parts of the U.S., ethanol is sometimes added to gasoline without an indication that it is a component.

India

In October 2007, the Government of India decided to make five percent ethanol blending (with gasoline) mandatory. Currently, 10 percent ethanol blended product (E10) is being sold in various parts of the country.[107][108] Ethanol has been found in at least one study to damage catalytic converters.[109]

Dyes

Though gasoline is a naturally colorless liquid, many gasolines are dyed in various colors to indicate their composition and acceptable uses. In Australia, the lowest grade of gasoline (RON 91) was dyed a light shade of red/orange, but is now the same color as the medium grade (RON 95) and high octane (RON 98), which are dyed yellow.[110] In the U.S., aviation gasoline (avgas) is dyed to identify its octane rating and to distinguish it from kerosene-based jet fuel, which is left colorless.[111] In Canada, the gasoline for marine and farm use is dyed red and is not subject to fuel excise tax in most provinces.[112]

Oxygenate blending

biobutanol. The presence of these oxygenates reduces the amount of carbon monoxide and unburned fuel in the exhaust. In many areas throughout the U.S., oxygenate blending is mandated by EPA regulations to reduce smog and other airborne pollutants. For example, in Southern California fuel must contain two percent oxygen by weight, resulting in a mixture of 5.6 percent ethanol in gasoline. The resulting fuel is often known as reformulated gasoline (RFG) or oxygenated gasoline, or, in the case of California, California reformulated gasoline (CARBOB). The federal requirement that RFG contain oxygen was dropped on 6 May 2006 because the industry had developed VOC-controlled RFG that did not need additional oxygen.[113]

MTBE was phased out in the U.S. due to groundwater contamination and the resulting regulations and lawsuits. Ethanol and, to a lesser extent, ethanol-derived ETBE are common substitutes. A common ethanol-gasoline mix of 10 percent ethanol mixed with gasoline is called gasohol or E10, and an ethanol-gasoline mix of 85 percent ethanol mixed with gasoline is called E85. The most extensive use of ethanol takes place in Brazil, where the ethanol is derived from sugarcane. In 2004, over 13 billion liters (3.4×10^9 U.S. gal) of ethanol was produced in the U.S. for fuel use, mostly from corn and sold as E10. E85 is slowly becoming available in much of the U.S., though many of the relatively few stations vending E85 are not open to the general public.[114]

The use of

BATF distillation permit has been easy since the 1973 oil crisis
).

Safety

HAZMAT class 3 gasoline

Toxicity

The

carcinogenic
.

People can be exposed to gasoline in the workplace by swallowing it, breathing in vapors, skin contact, and eye contact. Gasoline is toxic. The National Institute for Occupational Safety and Health (NIOSH) has also designated gasoline as a carcinogen.[117] Physical contact, ingestion, or inhalation can cause health problems. Since ingesting large amounts of gasoline can cause permanent damage to major organs, a call to a local poison control center or emergency room visit is indicated.[118]

Contrary to common misconception, swallowing gasoline does not generally require special emergency treatment, and inducing vomiting does not help, and can make it worse. According to poison specialist Brad Dahl, "even two mouthfuls wouldn't be that dangerous as long as it goes down to your stomach and stays there or keeps going". The U.S.

lavage, or administer activated charcoal.[119][120]

Inhalation for intoxication

Inhaled (huffed) gasoline vapor is a common intoxicant. Users concentrate and inhale gasoline vapor in a manner not intended by the manufacturer to produce euphoria and intoxication. Gasoline inhalation has become epidemic in some poorer communities and indigenous groups in Australia, Canada, New Zealand, and some Pacific Islands.[121] The practice is thought to cause severe organ damage, along with other effects such as intellectual disability and various cancers.[122][123][124][125]

In Canada, Native children in the isolated Northern Labrador community of

Sheshatshiu in 2000 and also in Pikangikum First Nation.[126] In 2012, the issue once again made the news media in Canada.[127]

Australia has long faced a petrol (gasoline) sniffing problem in isolated and impoverished

aboriginal communities. Although some sources argue that sniffing was introduced by U.S. servicemen stationed in the nation's Top End during World War II[128] or through experimentation by 1940s-era Cobourg Peninsula sawmill workers,[129] other sources claim that inhalant abuse (such as glue inhalation) emerged in Australia in the late 1960s.[130] Chronic, heavy petrol sniffing appears to occur among remote, impoverished indigenous
communities, where the ready accessibility of petrol has helped to make it a common substance for abuse.

In Australia, petrol sniffing now occurs widely throughout remote Aboriginal communities in the

Government of Australia and BP Australia began the usage of Opal fuel in remote areas prone to petrol sniffing.[133]
Opal is a non-sniffable fuel (which is much less likely to cause a high) and has made a difference in some indigenous communities.

Flammability

Uncontrolled burning of gasoline produces large quantities of soot and carbon monoxide.

Gasoline is extremely flammable due to its low

upper explosive limit
of 7.6 percent. If the concentration is below 1.4 percent, the air-gasoline mixture is too lean and does not ignite. If the concentration is above 7.6 percent, the mixture is too rich and also does not ignite. However, gasoline vapor rapidly mixes and spreads with air, making unconstrained gasoline quickly flammable.

Gasoline exhaust

The exhaust gas generated by burning gasoline is harmful to both the environment and to human health. After CO is inhaled into the human body, it readily combines with hemoglobin in the blood, and its affinity is 300 times that of oxygen. Therefore, the hemoglobin in the lungs combines with CO instead of oxygen, causing the human body to be

hypoxic, causing headaches, dizziness, vomiting, and other poisoning symptoms. In severe cases, it may lead to death.[134][135] Hydrocarbons only affect the human body when their concentration is quite high, and their toxicity level depends on the chemical composition. The hydrocarbons produced by incomplete combustion include alkanes, aromatics, and aldehydes. Among them, a concentration of methane and ethane over 35 g/m3 (0.035 oz/cu ft) will cause loss of consciousness or suffocation, a concentration of pentane and hexane over 45 g/m3 (0.045 oz/cu ft) will have an anesthetic effect, and aromatic hydrocarbons will have more serious effects on health, blood toxicity, neurotoxicity, and cancer. If the concentration of benzene exceeds 40 ppm, it can cause leukemia, and xylene can cause headache, dizziness, nausea, and vomiting. Human exposure to large amounts of aldehydes can cause eye irritation, nausea, and dizziness. In addition to carcinogenic effects, long-term exposure can cause damage to the skin, liver, kidneys, and cataracts.[136] After NOx enters the alveoli, it has a severe stimulating effect on the lung tissue. It can irritate the conjunctiva of the eyes, cause tearing, and cause pink eyes. It also has a stimulating effect on the nose, pharynx, throat, and other organs. It can cause acute wheezing, breathing difficulties, red eyes, sore throat, and dizziness causing poisoning.[136][137]

Environmental impact

In recent years, with the rapid development of the motor vehicle economy, the production and use of motor vehicles have increased dramatically, and the pollution by motor vehicle exhaust to the environment has become more and more serious. The air pollution in many large cities has changed from coal-burning pollution to "motor vehicle pollution". In the U.S., transportation is the largest source of carbon emissions, accounting for 30 percent of the total carbon footprint of the U.S.[138] Combustion of gasoline produces 2.35 kilograms per liter (19.6 lb/U.S. gal) of carbon dioxide, a greenhouse gas.[139][140]

Unburnt gasoline and

photochemical smog. Vapor pressure initially rises with some addition of ethanol to gasoline, but the increase is greatest at 10 percent by volume.[141]
At higher concentrations of ethanol above 10 percent, the vapor pressure of the blend starts to decrease. At a 10 percent ethanol by volume, the rise in vapor pressure may potentially increase the problem of photochemical smog. This rise in vapor pressure could be mitigated by increasing or decreasing the percentage of ethanol in the gasoline mixture. The chief risks of such leaks come not from vehicles, but gasoline delivery truck accidents and leaks from storage tanks. Because of this risk, most (underground) storage tanks now have extensive measures in place to detect and prevent any such leaks, such as monitoring systems (Veeder-Root, Franklin Fueling).

Production of gasoline consumes 1.5 liters per kilometer (0.63 U.S. gal/mi) of water by driven distance.[142]

Gasoline use causes a variety of deleterious effects to the human population and to the climate generally. The harms imposed include a higher rate of premature death and ailments, such as

global climate change, and other social costs. The costs imposed on society and the planet are estimated to be $3.80 per gallon of gasoline, in addition to the price paid at the pump by the user. The damage to the health and climate caused by a gasoline-powered vehicle greatly exceeds that caused by electric vehicles.[143][144]

Carbon dioxide

About 2.353 kilograms per liter (19.64 lb/U.S. gal) of carbon dioxide (CO2) are produced from burning gasoline that does not contain ethanol.[140] Most of the retail gasoline now sold in the U.S. contains about 10 percent fuel ethanol (or E10) by volume.[140] Burning E10 produces about 2.119 kilograms per liter (17.68 lb/U.S. gal) of CO2 that is emitted from the fossil fuel content. If the CO2 emissions from ethanol combustion are considered, then about 2.271 kilograms per liter (18.95 lb/U.S. gal) of CO2 are produced when E10 is combusted.[140]

Worldwide 7 liters of gasoline are burnt for every 100 km driven by

cars and vans.[145]

Also the International Energy Agency said in 2021 that: "To ensure fuel economy and CO2 emissions standards are effective, governments must continue regulatory efforts to monitor and reduce the gap between real-world fuel economy and rated performance."[145]

Contamination of soil and water

Gasoline enters the environment through the soil, groundwater, surface water, and air. Therefore, humans may be exposed to gasoline through methods such as breathing, eating, and skin contact. For example, using gasoline-filled equipment, such as lawnmowers, drinking gasoline-contaminated water close to gasoline spills or leaks to the soil, working at a gasoline station, inhaling gasoline volatile gas when refueling at a gasoline station is the easiest way to be exposed to gasoline.[146]

Use and pricing

The International Energy Agency said in 2021 that "road fuels should be taxed at a rate that reflects their impact on people's health and the climate".[145]

Europe

Countries in Europe impose substantially higher taxes on fuels such as gasoline when compared to the U.S. The price of gasoline in Europe is typically higher than that in the U.S. due to this difference.[147]

U.S.

U.S. Regular Gasoline Prices through 2018
RBOB Gasoline Prices
RBOB plus excise taxes on gasoline reflect prices paid at the pump

From 1998 to 2004, the price of gasoline fluctuated between $0.26 and $0.53 per liter ($1 and $2/U.S. gal).[148] After 2004, the price increased until the average gasoline price reached a high of $1.09 per liter ($4.11/U.S. gal) in mid-2008 but receded to approximately $0.69 per liter ($2.60/U.S. gal) by September 2009.[148] The U.S. experienced an upswing in gasoline prices through 2011,[149] and, by 1 March 2012, the national average was $0.99 per liter ($3.74/U.S. gal). California prices are higher because the California government mandates unique California gasoline formulas and taxes.[150]

In the U.S., most consumer goods bear pre-tax prices, but gasoline prices are posted with taxes included. Taxes are added by federal, state, and local governments. As of 2009, the federal tax was $0.049 per liter ($0.184/U.S. gal) for gasoline and $0.064 per liter ($0.244/U.S. gal) for

red diesel).[151]

About nine percent of all gasoline sold in the U.S. in May 2009 was premium grade, according to the Energy Information Administration. Consumer Reports magazine says, "If [your owner's manual] says to use regular fuel, do so—there's no advantage to a higher grade."[152] The Associated Press said premium gas—which has a higher octane rating and costs more per gallon than regular unleaded—should be used only if the manufacturer says it is "required".[153] Cars with turbocharged engines and high compression ratios often specify premium gasoline because higher octane fuels reduce the incidence of "knock", or fuel pre-detonation.[154] The price of gasoline varies considerably between the summer and winter months.[155]

There is a considerable difference between summer oil and winter oil in gasoline vapor pressure (Reid Vapor Pressure, RVP), which is a measure of how easily the fuel evaporates at a given temperature. The higher the gasoline volatility (the higher the RVP), the easier it is to evaporate. The conversion between the two fuels occurs twice a year, once in autumn (winter mix) and the other in spring (summer mix). The winter blended fuel has a higher RVP because the fuel must be able to evaporate at a low temperature for the engine to run normally. If the RVP is too low on a cold day, the vehicle will be difficult to start; however, the summer blended gasoline has a lower RVP. It prevents excessive evaporation when the outdoor temperature rises, reduces ozone emissions, and reduces smog levels. At the same time, vapor lock is less likely to occur in hot weather.[156]

Gasoline production by country

Gasoline production (per day; 2014)[157]
Country Gasoline production
Barrels
(thousands)
m3
(thousands)
ft3
(thousands)
kL
U.S. 8,921 1,418.3 50,090 1,418.3
China 2,578 409.9 14,470 409.9
Japan 920 146 5,200 146
Russia 910 145 5,100 145
India 755 120.0 4,240 120.0
Canada 671 106.7 3,770 106.7
Brazil 533 84.7 2,990 84.7
Germany 465 73.9 2,610 73.9
Saudi Arabia 441 70.1 2,480 70.1
Mexico 407 64.7 2,290 64.7
South Korea 397 63.1 2,230 63.1
Iran 382 60.7 2,140 60.7
UK 364 57.9 2,040 57.9
Italy 343 54.5 1,930 54.5
Venezuela 277 44.0 1,560 44.0
France 265 42.1 1,490 42.1
Singapore 249 39.6 1,400 39.6
Australia 241 38.3 1,350 38.3
Indonesia 230 37 1,300 37
Taiwan 174 27.7 980 27.7
Thailand 170 27 950 27
Spain 169 26.9 950 26.9
Netherlands 148 23.5 830 23.5
South Africa 135 21.5 760 21.5
Argentina 122 19.4 680 19.4
Sweden 112 17.8 630 17.8
Greece 108 17.2 610 17.2
Belgium 105 16.7 590 16.7
Malaysia 103 16.4 580 16.4
Finland 100 16 560 16
Belarus 92 14.6 520 14.6
Turkey 92 14.6 520 14.6
Colombia 85 13.5 480 13.5
Poland 83 13.2 470 13.2
Norway 77 12.2 430 12.2
Kazakhstan 71 11.3 400 11.3
Algeria 70 11 390 11
Romania 70 11 390 11
Oman 69 11.0 390 11.0
Egypt 66 10.5 370 10.5
UAE 66 10.5 370 10.5
Chile 65 10.3 360 10.3
Turkmenistan 61 9.7 340 9.7
Kuwait 57 9.1 320 9.1
Iraq 56 8.9 310 8.9
Vietnam 52 8.3 290 8.3
Lithuania 49 7.8 280 7.8
Denmark 48 7.6 270 7.6
Qatar 46 7.3 260 7.3

Comparison with other fuels

Below is a table of the

net, they are from the Oak Ridge National Laboratory's Transportation Energy Data Book.[158]

Fuel type Energy density Specific energy RON
Gross Net Gross Net
MJ/L BTU / U.S. gal MJ/L BTU / U.S. gal MJ/kg BTU/lb MJ/kg BTU/lb
Conventional gasoline 34.8 125,000 32.2 115,400 44.4 19,100[159] 41.1 17,700 91–98
LPG)[a]
26.8 96,000 46 20,000 108
Ethanol 21.2 76,000[159] 21.1 75,700 26.8 11,500[159] 26.7 11,500 108.7[160]
Methanol 17.9 64,000 15.8 56,600 22.6 9,700 19.9 8,600 123
Butanol 29.2 105,000 36.6 15,700 91–99[clarification needed]
Gasohol 31.2 112,000 31.3 112,400 93–94[clarification needed]
Diesel[b] 38.6 138,000 35.9 128,700 45.4 19,500 42.2 18,100 25
Biodiesel 33.3–35.7 119,000–128,000[161][clarification needed] 32.6 117,100
Avgas (high octane gasoline) 33.5 120,000 31 112,000 46.8 20,100 43.3 18,600
Jet fuel (kerosene based) 35.1 126,000 43.8 18,800
Jet fuel (naphtha) 35.5 127,500 33.1 118,700
Liquefied natural gas 25.3 91,000 55 24,000
Liquefied petroleum gas 25.4 91,300 23.3 83,500 46.1 19,800 42.3 18,200
Hydrogen[c] 10.1 36,000 0.036 130[162] 142 61,000 0.506 218

See also

Explanatory notes

  1. ^ Consisting mostly of C3 and C4 hydrocarbons
  2. ^ Diesel fuel is not used in a gasoline engine, so its low octane rating is not an issue; the relevant metric for diesel engines is the cetane number.
  3. ^ at −253.2 °C (−423.8 °F)

References

  1. .
  2. ^ "Why small planes still use leaded fuel decades after phase-out in cars". NBC News. 22 April 2021. Archived from the original on 2 June 2021. Retrieved 2 June 2021.
  3. ^ "Race Fuel 101: Lead and Leaded Racing Fuels". Archived from the original on 25 October 2020. Retrieved 30 July 2020.
  4. ^ "Preventing and Detecting Underground Storage Tank (UST) Releases". United States Environmental Protection Agency. 13 October 2014. Archived from the original on 10 December 2020. Retrieved 14 November 2018.
  5. ^ "Evaluation of the Carcinogenicity of Unleaded Gasoline". U.S. Environmental Protection Agency. Archived from the original on 27 June 2010.
  6. PMID 1981951
    .
  7. .
  8. ^ "Gasoline Sniffing". HealthyChildren.org. Retrieved 11 March 2024.
  9. ^ "Releases or emission of CO2 per Liter of fuel (Gasoline, Diesel, LPG)". 7 March 2008. Archived from the original on 1 August 2021. Retrieved 30 July 2021.
  10. from the original on 11 April 2019. Retrieved 16 September 2021.
  11. ^ Ritchie, Hannah; Roser, Max; Rosado, Pablo (11 May 2020). "CO₂ and Greenhouse Gas Emissions". Our World in Data. Global Change Data Lab. Retrieved 19 April 2023.
  12. ^ "Refining crude oil—U.S. Energy Information Administration (EIA)".
  13. ^ "Gas Can Fact Sheet".
  14. ^ "The etymology of gasoline". Oxford English Dictionary. Archived from the original on 29 July 2017. Retrieved 30 July 2017.
  15. ^ "The Etymology of Gasoline". Oxford English Dictionary. Archived from the original on 29 July 2017. Retrieved 30 July 2017.
  16. ^ See:
    • Oxford Dictionaries (blog): The etymology of gasoline
    • 38th Congress. Sessions I. Chapter 173: An Act to provide Internal Revenue to support the Government, to pay Interest on the Public Debt, and for other Purposes, 1864, p. 265. " … ; And provided, also, That naphtha of specific gravity exceeding eighty degrees, according to Baume's hydrometer, and of the kind usually known as gasoline, shall be subject to a tax of five per centum ad valorem." See Library of Congress (US) Archived 13 November 2018 at the Wayback Machine
    • See also: Stevens, Levi, "Improved apparatus for vaporizing and aerating volatile hydrocarbon", Archived 27 August 2018 at the Wayback Machine U.S. Patent no. 45,568 (issued: 20 December 1864). From p. 2 of the text: "One of the products obtained from the distillation of petroleum is a colorless liquid having an ethereal odor and being the lightest in specific gravity of all known liquids. This material is known now in commerce by the term "gasoline". "
  17. ^ "petroleum" Archived 16 May 2020 at the Wayback Machine, in the American Heritage Dictionary
  18. ^ Medieval Latin: literally, rock oil = Latin petr(a) rock (< Greek pétra) + oleum oil "Petroleum". The Free Dictionary. Archived from the original on 10 January 2017. Retrieved 16 September 2021.
  19. ^ "Carless, Capel & Leonard", vintagegarage.co.uk, accessed 5 August 2012
  20. ^ "Carless, Capel and Leonard Ltd Records: Administrative History Archived 29 June 2013 at the Wayback Machine", The National Archives, accessed 5 August 2012
  21. ^ gasoline, n., and gasoline, n., Oxford English Dictionary online edition
  22. ^ "Online Etymology Dictionary". etymonline.com. Archived from the original on 9 January 2006.
  23. ^ Hincks, Ron (2004). "Our Motoring Heritage: gasoline & Oil". Chrysler Collector (154): 16–20.
  24. ^ Kemp, John (18 March 2017). "India's thirst for gasoline helps spur global oil demand: Kemp". Reuters. Archived from the original on 30 August 2017. India's drivers used 500,000 barrels per day of motor spirit in the 12 months ending in February 2016, according to the Petroleum Planning and Analysis Cell of the Ministry of Petroleum.
  25. from the original on 17 February 2017. Based on estimated provided by the oil refining industry, the Department of National Development and Energy has estimated that the decision to reduce the RON of premium motor spirit from 98 to 97 has resulted in an annual saving equivalent to about 1.6 million barrels of crude oil.
  26. ^ "Premium Motor Spirit". Oando PLC. Archived from the original on 17 February 2017.
  27. PMID 19936128
    .
  28. ^ "Difference Between Gasoline and Petrol". Compare the Difference Between Similar Terms. 23 February 2013. Archived from the original on 15 May 2021. Retrieved 15 May 2021.
  29. ^ "Nafta in English – Spanish to English Translation". SpanishDict. Archived from the original on 6 February 2010.
  30. ^ "Gasolio". Retrieved 18 March 2022.
  31. ^ "N-OCTANE / CAMEO Chemicals / NOAA". National Oceanic and Atmospheric Administration. Archived from the original on 24 August 2023. Retrieved 6 November 2023.
  32. ^ Daniel Yergen, The Prize, The Epic Quest for Oil, Money & Power, Simon & Schuster, 1992, pp. 150–63.
  33. ^ a b Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, pp. 1–4.
  34. ^ Farm Implements. Farm Implement Publishing Company. 1917. Archived from the original on 29 January 2020. Retrieved 9 November 2019.
  35. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 10.
  36. ^ Schlaifer, Robert (1950). Development of Aircraft Engines: Two Studies of Relations Between Government and Business. p. 569. Archived from the original on 31 January 2021. Retrieved 4 September 2020.
  37. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 252
  38. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 3.
  39. ^ "1903 Wright Engine". Archived from the original on 4 July 2018. Retrieved 25 January 2022.
  40. ^ "The Power to Fly: The Wright Brothers' 1903 Engine". Mac's MOTOR CITY GARAGE. 4 January 2020. Retrieved 16 June 2023.
  41. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, pp. 6–9.
  42. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 74.
  43. .
  44. ^ Pogue, Joseph E. (September 1919). "The Engine-Fuel Problem". The Journal of the Society of Automotive Engineers: 232. Archived from the original on 28 July 2020. Retrieved 18 June 2018.
  45. ^ Marshall, E. L. "Early Liquid Fuels and the Controversial Octane Number Tests" (PDF). newcomen.com. p. 227. Archived from the original (PDF) on 17 June 2018.
  46. ^ "The Water Network | by AquaSPE". Archived from the original on 3 June 2020. Retrieved 17 June 2018.
  47. ^
    S2CID 44633845
    .
  48. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 22.
  49. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 20.
  50. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, p. 34.
  51. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, pp. 12–19.
  52. ^ Mingos, Howard, ed. (1936). The Aircraft Year Book for 1936 (PDF) (18th ed.). New York: Aeronautical Chamber of Commerce of America. Archived (PDF) from the original on 2 January 2020. Retrieved 2 April 2020.
  53. (PDF) from the original on 29 March 2020. Retrieved 29 March 2020.
  54. ^ Matthew Van Winkle, Aviation Gasoline Manufacture, McGraw-Hill, 1944, pp. 94–95.
  55. ^ Aviation Gasoline Production and Control (PDF) (Report). Air Historical Office Headquarters, Army Air Forces: Army Air Forces Historical Studies. September 1947. p. 2. Archived (PDF) from the original on 29 January 2020. Retrieved 10 November 2018.
  56. ^ Robert W. Czeschin, The Last Wave; Oil, War, and Financial Upheaval in the 1990s, Agora Inc., 1988, pp. 13–14.
  57. ^ Robert W. Czeschin, The Last Wave; Oil, War, and Financial Upheaval in the 1990s, Agora Inc., 1988, p. 17.
  58. ^ Robert W. Czeschin, The Last Wave; Oil, War, and Financial Upheaval in the 1990s, Agora Inc., 1988, p. 19.
  59. ^ "Kurfürst – Technical Report No 145-45 Manufacture of Aviation Gasoline in Germany". Archived from the original on 6 November 2018. Retrieved 10 November 2018.
  60. ^ Daniel Yergin, The Prize, Simon & Schuster, 1992, pp. 310–312
  61. ^ Daniel Yergin, The Prize, Simon & Schuster, 1992, pp. 316–317
  62. ^ Daniel Yergen, The Prize, The Epic Quest for Oil, Money & Power, Simon & Schuster, 1992, p. 327
  63. ^ Erna Risch and Chester L. Kieffer, United States Army in World War II, The Technical Services, The Quartermaster Corps: Organization, Supply, and Services, Office of the CHief of Military History, Department of the Army, Washington, D.C., 1955, pp. 128–129
  64. ^ Robert E. Allen, Director of Information, American Petroleum Institute, The American Year Book – 1946, Thomas Nelson & Sons, 1947, p. 499
  65. ^ Robert E. Allen, Director of Information, American Petroleum Institute, The American Year Book – 1946, Thomas Nelson & Sons, 1947, pp. 512–518
  66. ^ Aviation Gasoline Production and Control (PDF) (Report). Air Historical Office Headquarters, Army Air Forces: Army Air Forces Historical Studies. September 1947. p. 3. Archived (PDF) from the original on 29 January 2020. Retrieved 10 November 2018.
  67. ^ Robert E. Allen, Director of Information, American Petroleum Institute, The American Year Book – 1944, Thomas Nelson & Sons, 1945, p. 509
  68. ^ Aviation Gasoline Production and Control (PDF) (Report). Air Historical Office Headquarters, Army Air Forces: Army Air Forces Historical Studies. September 1947. p. 4. Archived (PDF) from the original on 29 January 2020. Retrieved 10 November 2018.
  69. ^ Robert E. Allen, Director of Information, American Petroleum Institute, The American Year Book – 1946, Thomas Nelson & Sons, 1947, p. 498
  70. JSTOR 44547538
    .
  71. ^ Sanders, Gold V. (June 1946). Popular Science. pp. 124–126. Archived from the original on 29 January 2020. Retrieved 4 May 2019.
  72. ^ "MotorCities – One Horsepower per Cubic Inch: 1957 Chevy Corvette | 2018 | Story of the Week". Archived from the original on 30 November 2020. Retrieved 4 May 2019.
  73. ^ Williams, Duke (1 July 2012). "Tuning Vintage Corvette Engines for Maximum Performance and Fuel Economy" (PDF). metroli.org. Archived from the original on 29 January 2020. Retrieved 16 September 2021.
  74. ^ "Engine Weight FYI". Archived from the original on 23 July 2020. Retrieved 4 May 2019.
  75. ^
  76. ^ "Hydrocarbon Gas Liquids Explained - U.S. Energy Information Administration (EIA)". www.eia.gov. Retrieved 5 August 2022.
  77. ^ (PDF) from the original on 2 November 2021. Retrieved 18 September 2021.
  78. ^ "Gasoline—a petroleum product". U.S. Energy Information Administration website. U.S. Energy Information Administration. 12 August 2016. Archived from the original on 24 May 2017. Retrieved 15 May 2017.
  79. NOAA. Archived from the original
    on 20 August 2002.
  80. from the original on 28 July 2020. Retrieved 31 March 2020.
  81. ^ "Energy Information Administration". www.eia.gov. Archived from the original on 15 December 2015.
  82. ^ "Fuel Properties Comparison" (PDF). Alternative Fuels Data Center. Archived from the original (PDF) on 31 October 2016. Retrieved 31 October 2016.
  83. ^ "Oil Industry Statistics from Gibson Consulting". Archived from the original on 12 September 2008. Retrieved 31 July 2008.
  84. ^ "Quality of petrol and diesel fuel used for road transport in the European Union (Reporting year 2013)". European Commission. Archived from the original on 22 April 2021. Retrieved 31 July 2020.
  85. ^ "Types Of Car Fuel". Archived from the original on 25 September 2020. Retrieved 31 July 2020.
  86. ^ "Sunoco CFR Racing Fuel". Archived from the original on 21 October 2020. Retrieved 31 July 2020.
  87. ^ Ryan Lengerich Journal staff (17 July 2012). "85-octane warning labels not posted at many gasoline stations". Rapid City Journal. Archived from the original on 15 June 2015.
  88. ^ "95/93 – What is the Difference, Really?". Automobile Association of South Africa (AA). Archived from the original on 29 December 2016. Retrieved 26 January 2017.
  89. from the original on 19 June 2013.
  90. ^ "UAE switches to unleaded fuel". January 2003. Archived from the original on 12 April 2020. Retrieved 12 April 2020.
  91. ^ Matthews, Dylan (22 April 2013). "Lead abatement, alcohol taxes and 10 other ways to reduce the crime rate without annoying the NRA". Washington Post. Archived from the original on 12 May 2013. Retrieved 23 May 2013.
  92. ^ Marrs, Dave (22 January 2013). "Ban on lead may yet give us respite from crime". Business Day. Archived from the original on 6 April 2013. Retrieved 23 May 2013.
  93. ^ Reyes, J. W. (2007). "The Impact of Childhood Lead Exposure on Crime" (Archived 29 September 2007 at the Wayback Machine). National Bureau of Economic Research. "a" ref citing Pirkle, Brody, et al. (1994). Retrieved 17 August 2009.
  94. ^ "Ban on leaded petrol 'has cut crime rates around the world'". 28 October 2007. Archived from the original on 29 August 2017.
  95. ^ "Highly polluting leaded petrol now eradicated from the world, says UN". BBC News. 31 August 2021. Archived from the original on 25 January 2022. Retrieved 16 September 2021.
  96. ^ Miranda, Leticia; Farivar, Cyrus (12 April 2021). "Leaded gas was phased out 25 years ago. Why are these planes still using toxic fuel?". NBC News. Archived from the original on 15 September 2021. Retrieved 16 September 2021.
  97. ^ Seggie, Eleanor (5 August 2011). "More than 20% of SA cars still using lead-replacement petrol but only 1% need it". Engineering News. South Africa. Archived from the original on 13 October 2016. Retrieved 30 March 2017.
  98. ^ Clark, Andrew (14 August 2002). "Petrol for older cars about to disappear". The Guardian. London. Archived from the original on 29 December 2016. Retrieved 30 March 2017.
  99. ^ "AA warns over lead replacement fuel". The Daily Telegraph. London. 15 August 2002. Archived from the original on 21 April 2017. Retrieved 30 March 2017.
  100. ^ Hollrah, Don P.; Burns, Allen M. (11 March 1991). "MMT Increases Octane While Reducing Emissions". www.ogj.com. Archived from the original on 17 November 2016.
  101. ^ "EPA Comments on the Gasoline Additive MMT". www.epa.gov. 5 October 2015. Archived from the original on 17 November 2016.
  102. ^ "Directive 2009/30/EC of the European Parliament and of the Council of 23 April 2009". Archived from the original on 22 September 2016. Retrieved 31 July 2020.
  103. ^ "Protocol for the Evaluation of Effects of Metallic Fuel-Additives on the Emissions Performance of Vehicles" (PDF). Archived (PDF) from the original on 1 March 2021. Retrieved 31 July 2020.
  104. ^ A1 AU 2000/72399 A1  Gasoline test kit
  105. ^ "Top Tier Detergent Gasoline (Deposits, Fuel Economy, No Start, Power, Performance, Stall Concerns)", GM Bulletin, 04-06-04-047, 06-Engine/Propulsion System, June 2004
  106. ^ "MEDIDA PROVISÓRIA nº 532, de 2011". senado.gov.br. Archived from the original on 19 September 2011.
  107. ^ "Government to take a call on ethanol price soon". The Hindu. Chennai, India. 21 November 2011. Archived from the original on 5 May 2012. Retrieved 25 May 2012.
  108. ^ "India to raise ethanol blending in gasoline to 10%". 22 November 2011. Archived from the original on 7 April 2014. Retrieved 25 May 2012.
  109. ^ "European Biogas Association" (PDF). Archived from the original (PDF) on 24 March 2016. Retrieved 16 March 2016.
  110. ^ "The Color of Australian Unleaded Petrol Is Changing To Red/Orange" (PDF). Archived from the original (PDF) on 9 April 2013. Retrieved 22 November 2012.
  111. ^ "EAA – Avgas Grades". 17 May 2008. Archived from the original on 17 May 2008.
  112. ^ "Fuel Taxes & Road Expenditures: Making the Link" (PDF). p. 2. Archived (PDF) from the original on 10 April 2014. Retrieved 26 September 2017.
  113. U.S. Environmental Protection Agency. 22 February 2006. Archived
    from the original on 20 September 2005.
  114. on 14 July 2008. Retrieved 14 July 2008.
  115. ^ Material safety data sheet Archived 28 September 2007 at the Wayback Machine Tesoro petroleum Companies, Inc., U.S., 8 February 2003
  116. ^ "CDC – NIOSH Pocket Guide to Chemical Hazards – Gasoline". www.cdc.gov. Archived from the original on 16 October 2015. Retrieved 3 November 2015.
  117. PMID 8020435
    .
  118. ^ University of Utah Poison Control Center (24 June 2014), Dos and Don'ts in Case of Gasoline Poisoning, University of Utah, archived from the original on 8 November 2020, retrieved 15 October 2018
  119. ^ Agency for Toxic Substances and Disease Registry (21 October 2014), Medical Management Guidelines for Gasoline (Mixture) CAS# 86290-81-5 and 8006-61-9, Centers for Disease Control and Prevention, archived from the original on 14 November 2020, retrieved 13 December 2018
  120. ^ gasoline Sniffing Fact File[permanent dead link] Sheree Cairney, www.abc.net.au, Published 24 November 2005. Retrieved 13 October 2007, a modified version of the original article[dead link], now archived [1][permanent dead link]
  121. from the original on 14 August 2017.
  122. ^ "Rising Trend: Sniffing Gasoline – Huffing & Inhalants". 16 May 2013. Archived from the original on 20 December 2016. Retrieved 12 December 2016.
  123. ^ "Petrol Sniffing / Gasoline Sniffing". Archived from the original on 21 December 2016. Retrieved 12 December 2016.
  124. ^ "Benzene and Cancer Risk". American Cancer Society. Archived from the original on 25 January 2021. Retrieved 7 December 2020.
  125. ^ Lauwers, Bert (1 June 2011). "The Office of the Chief Coroner's Death Review of the Youth Suicides at the Pikangikum First Nation, 2006–2008". Office of the Chief Coroner of Ontario. Archived from the original on 30 September 2012. Retrieved 2 October 2011.
  126. ^ "Labrador Innu kids sniffing gas again to fight boredom". CBC.ca. Archived from the original on 18 June 2012. Retrieved 18 June 2012.
  127. ^ Wortley, R.P. (29 August 2006). "Anangu Pitjantjatjara Yankunytjatjara Land Rights (Regulated Substances) Amendment Bill". Legislative Council (South Australia). Hansard. Archived from the original on 29 September 2007. Retrieved 27 December 2006.
  128. ^ Brady, Maggie (27 April 2006). "Community Affairs Reference Committee Reference: Petrol sniffing in remote Aboriginal communities" (PDF). Official Committee Hansard (Senate). Hansard: 11. Archived from the original (PDF) on 12 September 2006. Retrieved 20 March 2006.
  129. ^ Kozel, Nicholas; Sloboda, Zili; Mario De La Rosa, eds. (1995). Epidemiology of Inhalant Abuse: An International Perspective (PDF) (Report). National Institute on Drug Abuse. NIDA Research Monograph 148. Archived from the original (PDF) on 5 October 2016.
  130. ^ "Petrol-sniffing reports in Central Australia increase as kids abuse low aromatic Opal fuel". ABC News. 10 May 2022. Retrieved 16 May 2022.
  131. ^ Williams, Jonas (March 2004). "Responding to petrol sniffing on the Anangu Pitjantjatjara Lands: A case study". Social Justice Report 2003. Human Rights and Equal Opportunity Commission. Archived from the original on 31 August 2007. Retrieved 27 December 2006.
  132. ^ Submission to the Senate Community Affairs References Committee by BP Australia Pty Ltd Archived 14 June 2007 at the Wayback Machine Parliament of Australia Web Site. Retrieved 8 June 2007.
  133. ^ "Carbon Monoxide Poisoning" (PDF). Archived (PDF) from the original on 1 January 2022. Retrieved 12 December 2021.
  134. ^ "Carbon monoxide poisoning - Symptoms and causes". Mayo Clinic. Archived from the original on 12 December 2021. Retrieved 12 December 2021.
  135. ^ a b x-engineer.org. "Effects of vehicle pollution on human health – x-engineer.org". Archived from the original on 12 December 2021. Retrieved 12 December 2021.
  136. ^ "NOx gases in diesel car fumes: Why are they so dangerous?". phys.org. Archived from the original on 12 December 2021. Retrieved 12 December 2021.
  137. ^ "Facts About Gasoline". Coltura - moving beyond gasoline. Archived from the original on 9 December 2021. Retrieved 12 December 2021.
  138. ^ "How Gasoline Becomes CO2". Slate Magazine. 1 November 2006. Archived from the original on 20 August 2011.
  139. ^ a b c d Public Domain This article incorporates text from this source, which is in the public domain: "How much carbon dioxide is produced by burning gasoline and diesel fuel?". U.S. Energy Information Administration (EIA). Archived from the original on 27 October 2013.
  140. .
  141. ^ "Water Intensity of Transportation" (PDF). Archived from the original (PDF) on 15 September 2013. Retrieved 6 October 2016.
  142. ^ Phys.Org, 4 Mar. 2015 "New Models Yield Clearer Picture of Emissions' True Costs" Archived 25 November 2020 at the Wayback Machine
  143. S2CID 41970160
    .
  144. ^ a b c "Fuel Consumption of Cars and Vans – Analysis". IEA. November 2021. Archived from the original on 3 May 2022.
  145. ^ "Gasoline, Automotive | ToxFAQs™ | ATSDR". wwwn.cdc.gov. Archived from the original on 12 December 2021. Retrieved 12 December 2021.
  146. ^ "Fuel Prices and New Vehicle Fuel Economy in Europe" (PDF). MIT Center for Energy and Environmental Policy Research. August 2011. Archived (PDF) from the original on 13 November 2020. Retrieved 20 April 2020.
  147. ^ a b "Gas Prices: Frequently Asked Questions". fueleconomy.gov. Archived from the original on 21 January 2011. Retrieved 16 August 2009.
  148. ^ "Fiscal Facts". Archived from the original on 6 July 2009. Retrieved 12 June 2009.
  149. ^ "Regional gasoline price differences - U.S. Energy Information Administration (EIA)". Archived from the original on 15 November 2021. Retrieved 15 November 2021.
  150. ^ "When did the Federal Government begin collecting the gas tax?—Ask the Rambler — Highway History". FHWA. Archived from the original on 29 May 2010. Retrieved 17 October 2010.
  151. ^ "New & Used Car Reviews & Ratings". Consumer Reports. Archived from the original on 23 February 2013.
  152. ^ "Gassing up with premium probably a waste". philly.com. 19 August 2009. Archived from the original on 21 August 2009.
  153. ^ Biello, David. "Fact or Fiction?: Premium Gasoline Delivers Premium Benefits to Your Car". Scientific American. Archived from the original on 12 October 2012.
  154. ^ "Why is summer fuel more expensive than winter fuel?". HowStuffWorks. 6 June 2008. Archived from the original on 30 May 2015. Retrieved 30 May 2015.
  155. ^ "Why Is Gas More Expensive in the Summer Than in the Winter?". HowStuffWorks. 6 June 2008. Archived from the original on 24 October 2021. Retrieved 13 October 2021.
  156. ^ "Gasoline production - Country rankings". Archived from the original on 22 September 2020. Retrieved 7 March 2019.
  157. ^ "Appendix B – Transportation Energy Data Book". ornl.gov. Archived from the original on 18 July 2011. Retrieved 8 July 2011.
  158. ^ a b c George Thomas. "Overview of Storage Development DOE Hydrogen Program" (PDF). Archived from the original (PDF) on 21 February 2007. (99.6 KB). Livermore, California. Sandia National Laboratories. 2000.
  159. .
  160. ^ "Extension Forestry" (PDF). North Carolina Cooperative Extension. Archived from the original (PDF) on 22 November 2012.
  161. ^ "Frequently Asked Questions". The National Hydrogen Association. 25 November 2005. Archived from the original on 25 November 2005.

Bibliography

External links

Images