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Old 10-01-2012, 05:12 AM
greendoctor greendoctor is online now
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Location: Honolulu, Hawaii
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Ethanol has less carbon per pound versus petroleum because of the oxygen in its molecule. The lower percentage of carbon is why there are fewer BTUs, therefore less energy released when it is burned or used in an engine. That oxygen in its molecule is what contributes to its corrosive properties above and beyond what is caused by its tendency to absorb water. In terms of fuel value: ethanol<gasoline<biodiesel<diesel.
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