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Team from GM, Ford, FCA reviews how to calculate engine efficiency benefits of high octane fuels

Green Car Congress

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. Davis, Asim Iqbal, Ronald A. —Leone et al. —Leone et al. Leone, James E. 5b01420.

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