Quote:
Originally Posted by Toyarzee
Added 1 gal of 91 in my near full tank and it really does make a difference. Maybe I really can stay on the corn juice, thanks guys
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you can do the math... .1/12.5+.85*11.5/12.5=.79 if you are running true e85 and the 91 has 10% e like it should thats what you are at. so you essentially did nothing except lower the octane rating a bit.