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Northwest Arkansas primarily sells 87/89/91 octane. 93 octane is available at select Kum & Go's in the Northwest and Central regions of the state. California: 87 89 91 Colorado: 85 87 91 Connecticut: 87 89 93 86 octane may be sold if labeled as economy [1] Delaware: 87 89 93 Florida: 87 [2] 89 93 91 octane premium is sold at select stations ...
Octane isomers such as n-octane and 2,3,3-trimethylpentane have an octane rating of -20 and 106.1, respectively (RON measurement). [89] The large differences between the octane ratings for the isomers show that the compound octane itself is clearly not the only factor that determines octane ratings, especially for commercial fuels consist of a ...
In Canada, the most commonly found octane grades are 87 (regular), 89 (mid grade) and 91 (premium), using the same "(R+M)/2 Method" used in the US (see below). In China, the most commonly found octane grade is RON 91 (regular), 93 (mid grade) and 97 (premium). Almost all of the fuel has been unleaded since 2000.
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A low octane rated fuel may cause engine knocking and reduced efficiency in reciprocating engines. Tetraethyl lead was once widely used to increase the octane rating but are not used in modern automotive gasoline due to the health hazard. Aviation, off-road motor vehicles, and racing car motors still use leaded gasolines. [2] [3]
However, the fuel systems of cars, trucks, and motorcycles sold before the ethanol mandate may suffer substantial damage from the use of 10% ethanol blends. Flexible-fuel cars, trucks, and minivans use gasoline/ethanol blends ranging from pure gasoline up to 85% ethanol . By early 2013 there were around 11 million E85-capable vehicles on U.S ...
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 m 3; 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.
From 1 January 1996, the U.S. Clean Air Act banned the sale of leaded fuel for use in on-road vehicles although that year the US EPA indicated that TEL could still be used in aircraft, racing cars, farm equipment, and marine engines. [117] Thus, what had begun in the U.S. as a phasedown ultimately ended in a phase-out for on-road vehicle TEL.