I've have/had 2 FFV the both loose/lost roughly 20% mpg so when the price is right I run it. Filled up Friday, $2.65 E10, $1.89 E85. Check out the Impala fuel log, it really just comes down to math/price swings. We have plenty of E0 here but at $0.30 (roughly 10%) more per gallon but the mpg loss is closser to 3% it makes no sense.
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