Has anyone run E85 in their cars? I’m curious on how they will act

 

I'm going to go out on a limb here and say No, not on the stock ECU. It can't compensate for the additional fuel requirements E85 would require. That said I'm sure there are people running standalone ECUs who have and do use E85. It is a topic of discussion I'm pretty sure in the engine management forums.

 

This topic has been discussed ad nauseam in the past. Here's an interesting link to one tread that I pulled up: https://www.rx7club.com/2nd-generati...rbo-fc-764262/

 

Don't run E85 on a stock ECU. Hell, even with a properly tuned aftermarket and the multitude of fuel system mods/replacements you'll need to make to run E85, corrosion problems with fuel tanks, lines, filters & rubber/plastic sealing components will be such a continuous PITA with E85 that it's not worth it IMHO.