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

Green Car Congress

fuel with higher ethanol content—for part- and full-load operation for different engine types and fuel assumptions. Alcohol and gasoline-alcohol blends also offer efficiency benefits independent of their octane value. Their paper is published in the ACS journal Environmental Science & Technology. —Leone et al.

Engine 150
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Perspective: US Needs to Transition to Hydrous Ethanol as the Primary Renewable Transportation Fuel

Green Car Congress

Designated volatility attainment and designated volatility nonattainment areas and their exact boundaries are described in 40 CFR part 81, or such part as shall later be designated for that purpose. d) further provides for alcohol blends as follows: Special provisions for alcohol blends. (1) 40 CFR ยง 80.27(d)