20013 Ford regular cab F-150 5.0 V-8 4x4 3.73 rear 5500 pounds empty, 7500+/- pounds with the camper: 15-16 mpg for first 50,000 miles with the camper on full time, all by the tank fills. 2015's 18,000 miles averaged 15.6 mpg. 61-69 mph with 66 mph being the sweet spot of speed and fuel economy. Gravel roads with four wheel drive are 14 mpg. 70+ mph puts us in the 14's mpg.