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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. In all engines, including the existing on-road fleet, fuel with higher octane ratings can enable more advanced spark timing and combustion phasing under knock-limited conditions. —Leone et al. —Leone et al.

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

Green Car Congress

AUGUST 30, 2009

The 1979 Iranian crisis and related oil price shock accelerated Brazil’s conversion of its gasoline supply and automobile fleet. d) further provides for alcohol blends as follows: Special provisions for alcohol blends. (1) The water contained in hydrous ethanol blends also reduces NO x emissions.

Transportation 317
Transportation Fuel Renewable Gasoline-Electric 317
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