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Old 03-27-2014, 10:55 AM   #14 (permalink)
Istas
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Quote:
Originally Posted by Cobb View Post
I thought ethanol increased octane? My insight loves 6 gallons of regular bp and 4 gallons of e85.
Not to get too far off topic of the thread, but as Mista Bone said. Straight ethanol has about 66% the energy content per volume of straight gasoline, so to get the same energy you need to buy 50% more ethanol than gasoline. (A direct effect of this is the fuel injectors and fuel pump on an E85 engine need to have higher output to produce the same power.)

Consequently, an engine needs to be much more efficient running on ethanol than an equivalent engine running on gasoline to get the same price per mile, unless the ethanol is much cheaper... which (for corn ethanol) only comes about through subsidies that we pay for with our taxes.
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