Well I put 305 miles on my truck today mixed driving. About 85% of it was interstate driving from 60 mph to 85 mph with a few times getting on it hard. The other 15% consisted of stop and go traffic, dicking around getting on it, and blowing smoke. My average for the trip was 14.52 mpg with the 310 tune hand calculated. Its not bad fuel mileage, but I expected to see a little higher than that.
Truck has 35" Toyo Open Country AT's, 2.5" leveling kit, and 3 1/4" rear blocks, along with the mods in my signature.