Quote:
Originally Posted by 101Volts
I expect to work with 100% gas in it sometimes, as well; This is indeed more costly and the MPG/Cost figure is not equal right now (Ethanol gas: $2.859, 91 grade 100% Gas $3.459) but it's also an older car which may benefit from this more.
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As a rule of thumb, for each 1% ethanol content in gasoline, you shall expect a 0.3% decrease in mileage.