Actually it is about 3% better gas mileage but the cost is more than 3% higher. I have had several cars with aluminum blocks and heads and no issues with 10% ethanol. Whatever floats your boat ...
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Originally Posted by 427dave
Can't do with computer controlling everything and 10.5:1 compression. Can use octane boost with the 89 however. Better than ethanol.
Gasoline without ethanol gets 10% better gas mileage and the biggest thing without ethanol is it does not corrode aluminum.
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