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Sounds to me like they did a bad job optimizing the engine for E85. No real big surprise there. Its a different fuel that requires a fairly different engine design to make it run efficiently. Gasoline likes lower compression ratios around 10-13:1 where as Ethanol likes 17:1 or more. Flex fuel vehicles are a big (IMO stupid) compromise. You can't design an engine to run efficiently on two different fuel types that require different engine designs.
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