Never saw anything on this for stangs like my '04 3.9, but I am on my 2nd tank of non ethanol gasoline and WOW what a difference. 2+ mpg better and she runs better, too. I'm running CAI, Bama tunes and Amsoil synthetics. That made 22.7 mpg vs. 19-20 mpg on e10. Any other comments on this?