No, I haven't but I have run meth on a few cars, so please remove your panties from your butt crack
Meth with good failsafe - check gauge for errors. Fill tank when told by gauge. Check nozzles every 6 months
E85 - Upgrade necessary fuel systems parts. Fill up at E85 pump. If you can't find one when you need gas, you have two choices. Fill up with 93 and 1. Not go WOT until your car adjust for 30% discrepancy, or two, keep your tuner in your car always. Worry about your fuel sender taking a dump.
Just seems easier to run meth for me. Obviously you don't. Don't deny the OP the chance to hear both sides.