Oft 2015 frs A/T
 

I bought my frs about 3 months ago and I love the car but I still want to get more from it. So I bought the oft my car is still fully stock and I am saving up to get other parts. The oft comes in tomorrow and I really want to run e85 since I have a station close to my house. I've been reading up alot on the oft but I still feel like when I have the actually thing I'm going to get confused and mess something up. I'm completely new to modifying cars or doing anything to them since this is my first car also. But the main question is am I going to have troubles switching to e85 learning everything all by my self? Anything I should be careful of?

I had the same concerns. Its simple. Run the tank to empty. Fill tank with e85. Drive under 3500rpm for a few miles till your fuel trims rise. Stop and flash e85 tune. Drive moderatly until trims stabilize. Lots of info and help here. Enjoy.

see here
http://www.ft86club.com/forums/showthread.php?t=67310

You shouldn't have issues if you follow steve99's link. If you haven't checked it out yet I recommend this E85 tune for US E85 vehicles.