[patton]

Your theoretical loss of MPG should be just about 15%, using 10% ethonol vs. pure gasoline.

[RipSawyer]

“Your theoretical loss of MPG should be just about 15%, using 10% ethonol vs. pure gasoline.”
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I don’t know the calculation for that but if I lose that much I would be better off if I could filter out the alcohol and throw it away before I fill up! Why does ten percent ethanol cause a fifteen percent mileage drop?