i'm gonna give it a shot after i have to fill up again. bout a week or so.

 

I also have a diablosport predator, it shouldnt change your fuel mileage at all really, maybe you changed your driving habits while trying it out? all the timing and a/f changes with the predator only occur at WOT, part throttle and anything but wot are still controlled by the factory calibrations. The only things that the predator changes full time, are the fan settings, trans modulation, gear ratio, odb test features. hope this helps..