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E85 approved for year round use? Anyone run the stuff?
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<blockquote data-quote="Petras" data-source="post: 262491" data-attributes="member: 216"><p>1 gallon of ethanol creates approximately 81,800 BTUs when put to work. Gasoline creates 114,000 BTUs when put to work. It takes 1.29 gallons of ethanol to do the same amount of work that 1 gallon of gasoline does. </p><p></p><p>That being said, Ethanol has a much higher octane rating than gasoline, this allows a modern engine burning ethanol to advance it's timing more than it would be able to do while burning gasoline before it starts to ping. Higher octane rating = more advanced timing = a little bit more pep in your step, BUT, the lower heat content of ethanol means much less fuel economy...</p><p></p><p>I should add that Iso-Butane is what is normally used to increase the octane rating of gasoline to what we need at the pump. Ethanols high octane rating makes it avery effective replacement for iso-butane to aid in the increasing of the octane rating for fuel. Often times it is cheaper for refineries to purchase ethanol to blend rather than break out iso-butane to use for blending (of course this doesn't take into effect the cost of government subsidies for the folks that grow the corn).</p></blockquote><p></p>
[QUOTE="Petras, post: 262491, member: 216"] 1 gallon of ethanol creates approximately 81,800 BTUs when put to work. Gasoline creates 114,000 BTUs when put to work. It takes 1.29 gallons of ethanol to do the same amount of work that 1 gallon of gasoline does. That being said, Ethanol has a much higher octane rating than gasoline, this allows a modern engine burning ethanol to advance it's timing more than it would be able to do while burning gasoline before it starts to ping. Higher octane rating = more advanced timing = a little bit more pep in your step, BUT, the lower heat content of ethanol means much less fuel economy... I should add that Iso-Butane is what is normally used to increase the octane rating of gasoline to what we need at the pump. Ethanols high octane rating makes it avery effective replacement for iso-butane to aid in the increasing of the octane rating for fuel. Often times it is cheaper for refineries to purchase ethanol to blend rather than break out iso-butane to use for blending (of course this doesn't take into effect the cost of government subsidies for the folks that grow the corn). [/QUOTE]
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