I have the 2010 flex fuel 4.7, Iwas more wondering if e85 could be used post tune (tow tune ftw thanks guys, much more fun than the 91perf)

Also are there specific e85 tunes for performance considering the loss in potential per liter of fuel...does it just run richer?does it use closed loop and adjust acordingly for the diff fuel

E85 isn't available in my state, but if Ihappen to find some ona road trip am Irisking damage with my towtune? The mpg goes down but Ithink the $/mi goes down as well

Currently i get 14mpg consistantly, but Ihave a heavy foot

How much is the mpg drop for e85 are we talking 8mpg or 12mpg
What about power, does the truck lose any on e85
Can you tell its e85 v 87reg besides watching the fuel needle?