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. The vast majority (87%) of gasoline sold in the US in 2013 was regular grade, with 10% premium and 3% midgrade. —Leone et al. Premium-grade gasoline is listed as 91−93 AKI minimum, corresponding to 96−98 RON.
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