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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 concept of an “effective octane number” calculates overall knock resistance of fuel in modern engines, including the effects of charge cooling. —Leone et al. In their study, Leone et al.

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

Green Car Congress

The government assisted the shift by giving sugar companies subsidized loans to build ethanol plants, as well as guaranteeing prices for their ethanol products. Both production and consumption of ethanol were basically flat for much of the mid-1980s to the mid-1990s. As used in this section and Sec. 40 CFR § 80.27(d)