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Message: <blockquote data-quote="yacob.naif" data-source="post: 2424135" data-attributes="member: 565696">Oh, and to further complicate the original answer, a conventional engine will show no change in fuel economy with an ethanol mix while cruising, but you'll have to spend more time in lower gars accelerating, which is what may be causing you decreased fuel economy.At a constant speed, at the peak of your torque curve, your car would get the same fuel economy with 0%, 10% or 20% ethanol.</blockquote>

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