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Old 09-09-2011, 03:04 PM   #2
landrovered
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Join Date: Nov 2009
Location: Madison, Georgia
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Garage
First...ethanol does not contain as many calories as gasoline so you will see a reduction in MPG when ethanol is added. Burning of one kilogram of gasoline produces about 10500 kilocalories. Burning one kilogram of ethanol produces about 7140 kilocalories.

If the fuel is 10% ethanol then the reduction will be minimal, a 4% reduction in calories by my calculations.

The problem is when the mix is not 10% then you can see a drop in performance.
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