[CaptainSlow]

I will be getting a tuner in this weekend...one of the capabilities is the ability to run E85. I was just wondering if there is anything special I should address before switching fuels...either for the first time or later on? Should I let the tank drain to a certain level (obviously as empty as possible, but is there a definite threshold)? Any fuel system treatments or anything? I don't plan to switch back and forth often, but I just want to make sure the transitions are as smooth and easy on the car as possible.

Thanks for any tips!