I got a tune from reptile, my mpgs went down the first few days, im ganna get a crank relearn done and see what happens. was getting 34-35 going 55 before the tune, was at 29 after. Oddly enough, set my cruise on way home from the 280 mile trip, and it got to 31 mpg. Only got 29 on the way down going 55. The -10 temps may have hurt it, im not sure. Ill see, but reptiles tune is good for me, performance when i want to try to be a racecar in a not so much racecar.