I haven't went and hand figured mine yet, but I do know it is better now after I deleted. Using a fuel additive I believe has gained me maybe 1 mpg also. Summer fuel has made a big difference I've noticed. The average on the truck went from just under 29 up to 32. I imagine if we did only highway driving on a trip, like say when we go to see family in Ohio, it would probably get higher than that. The instant mpg's will sit around 37 if you cruise at 70 mph on flat ground. I've noticed this on multiple occasions now. I don't believe the truck would truly average that much, but I would like to think that on the highway, I would get 32-34 mpg's now for a whole tank.