Team from GM, Ford, FCA reviews how to calculate engine efficiency benefits of high octane fuels
Green Car Congress
AUGUST 25, 2015
Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value. Most regular-grade gasoline in the US is sold with a minimum octane rating of 87 AKI, corresponding to approximately 91−92 RON. Premium-grade gasoline is listed as 91−93 AKI minimum, corresponding to 96−98 RON.
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