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An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without causing engine knocking.The higher the octane number, the more compression the fuel can withstand before detonating.
In the United States and Canada, octane ratings are in AKI, commonly shown as "(R+M)/2". All states require gas pumps to be labeled with the correct octane level and nearly all states do regular testing to make sure gas stations are in compliance. A minimum 82 octane fuel is recommended for most vehicles produced since 1984.
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).
Octane is a hydrocarbon and an alkane with the chemical formula C 8 H 18, and the condensed structural formula CH 3 (CH 2) 6 CH 3. Octane has many structural isomers that differ by the location of branching in the carbon chain. One of these isomers, 2,2,4-trimethylpentane (commonly called iso-octane), is used as one of the standard values in ...
A gang member “giggled” as he admitted to kidnapping a young Texas woman at gunpoint and threatening to pimp her out and sell her organs, according to cops.
Jennifer Love Hewitt is relishing a recent milestone.. On Nov. 21, the 9-1-1 actress, 45, and her husband, actor Brian Hallisay, celebrated 11 years of marriage. "That's like 190 years in ...
What does angel number 1212 mean for love? Angel number 1212 symbolizes balance. In relationships, this is encouragement to see the harmony in your relationship and your part in maintaining it.
As more effort is put into maximizing an engine to take advantage of E85's higher octane rating, engines achieve greater power advantages. One car that has higher power on ethanol is the Koenigsegg CCXR , which on ethanol is the fifth-most powerful production car, with 20% more horsepower on E85 than on gasoline.