The E85 gas station near me has E51-E83 Ethanol year round I haven't tested in winter. I tested 2 times and I get E80.
My question is about octane if I was to run straight E50 in the winter my octane would be 105.
Will 105 octane be fine in the winter and make fill ups easy?
This is for a E50 Pro Tune
105 octane straight E50 if that's what it is in winter, which the remainder is 87 gas anyways so it works no mixing.
99.9 octane with 93 E80 tested mixing $1 extra per gallon.
97.3 octane with 87 E80 tested mixing which is everywhere and cheap.
What would you guys do just pump the 93 mix to make the best power at 99.9 octane for the E50 pro tune?