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Message: <blockquote data-quote="918evo" data-source="post: 3328615" data-attributes="member: 6001"><p>The flex fuel capable cars do run and drive like normal cars; the E85 is about the same as 105-110 octane so with the proper tuning it is capable of more advanced timing and more boost if applicable, but ethanol is also about 1/3 less dense than gasoline, so it is not practical to use as you will have less range and the lower cost of e85 will be offset by the increased amount required. A better "dual fuel" option, especially in Oklahoma is natural gas, which is about $.99 a gas gallon equivalent at the moment.</p></blockquote><p></p>