I got the warning the first time last Sunday, coming back from Oklahoma. I figured I would run it as close to 0 as I could to eliminate the 91 Octane OK offers and put a tank full of 93 back in. - Texas FTW! However, umm, a friend is considering the JB4 Tune or Diablo, so when in Oklahoma, the E85 can be used...

He may be curious about what would happen if this tune were applied and E85 were run, and what would occur if the tank were not fully drained before reintroducing 93 back in. Should we road trip back and forth? Asking for a friend, of course.

- When it comes to MPG, I have yet to see anything above 12 MPG in this RHO when daily driving. I got 14.4 MPG driving to Grand Lake in OK from Dallas, but the truck did most of the driving. It seems when my foot hits the peddle, that MPG falls, significantly. WOT seems to impact it and I seem to always want to do that.