This is the time of year the mix will be back to 85/15. I bought E-85 at Thorntons 2 weeks ago ($3.29) and it checked at 78/22. I have never found any less than 78% ethanol at any station at any time of year. I do not make any carb changes and can't say that there is any performance difference. I do not try to tune for every last 1/100th ET. I bracket race and the ET is what it is for that day.
