Quote:
Originally Posted by Chas H
Ethanol is added to conform to laws requiring an oxygenated reformulated fuel for lower emissions on start up, not to increase octane rating.
The addition of ethanol will increase the octane rating if nothing else is done to the additive package. Refiners will modify the additive package by reducing the normal octane improving additives when ethanol is added so the resulting reformulation has -theoretically- the same octane value.
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Well the octane value is not the issue, It is the heat value of the fuel. My parents just retired to SD
(I guess it was not cold enough for them in pa) If they run the e85 in his Pick up the mpg drops to the point where it is cost nuetral vs gas.