Quote:
Originally Posted by knowitman
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.
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Exactly, the problem lies herein that there is no mass-commercially available vehicle designed to specifically run on e85.
(and running an e85 designed engine on gasoline is just as bad as running a gasoline designed engine on e85)