Comment YMMV as they say... (Score 1) 432
I've got a flex fuel suv, that I do run E85 in from time to time, when I can find it. Even then, I will only typically fill up on E85 when its at least 20% cheaper per gallon that gasoline. Otherwise, you are paying more for less energy. I usually see a reduction in MPG running on E85, if its a full tank, usually close to 20%. With that said, if you are planning longer trips, through the midwest, E85 can possibly save you a little bit of cash in some places. I took the trip out to the Dayton Hamvention this year, running mostly on E85.
Like they say, YMMV.