100% Gasoline vs 10% Ethanol
I have always heard that 100% gasoline is better for your engine. I have always payed a premium for 100% gasoline versus gasoline with Ethanol whenever possible. The other day I stumbled across and...
Forum Discussion
philh wrote:mich800 wrote:
Actually, an engine tuned for ethanol will make more power (the measure of work). So an absolute statement may not be true. It comes down if the extra power offsets the lower economy. And that is going to come down to the tune and the percent of ethanol in the fuel.
Ethanol fuel contains less BTU's of energy than pure gasoline. Some of the difference can be made by being less susceptible to preignition and increasing the compression, and/or timing.
Bottom line, octane rating side by side, alcohol in fuels decreases mpg.
WRT top fuel dragsters, they burn 10-20 gallons per quarter mile :)
My comment was based on that a gallon of ethanol will produce less work per gallon than pure gasoline. Work is defined as horsepower So a blanket statement is not necessarily true. The increase in horsepower may very well off set the additional fuel required.
I never said it would yield the same mpg.
