Quote:
Originally Posted by BEAR-AvHistory
I run a 93/100 mix but passing emails back & forth with Terry during alpha testing of the G5/ISO he recommended a max of 40% alcohol if you were mixing with E85.
When figuring out your mix at the pump its important to remember that 91 or 93 already has 10% alcohol so do the mix calculation against 30% E85.
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This really doesn't need to be that confusing. If you run E85, start with 3 gallons or approx. 25% ethanol to a full tank, take logs and see how everything responds. Good? Move up to 4 gallons and repeat. Good? Move up to 5 gallons and repeat. I personally wait until I'm at about 1/8 tank and do 5 gallons E85 and 7.5 gallons of 91. Simple as that, no need to get your scientific calculator out and start crunching a bunch of algebraic equations.