Quote:
Originally Posted by PoleCat2SSRS2010
Ethanol requires more fuel consumption always!
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In an engine truly designed for ethanol and not gasoline, you can get about the same gas mileage. Even though ethanol contains less BTU/gallon, it's higher octane rating/activation energy allows for a higher compression which helps the engine run closer to it's thermodynamic ideal efficiency meaning that a lower percentage of energy is lost as heat.