When it was new, 13mpg after bombing 19. 5 with the raised roof topper, 20. 5 empty, driving 65. Usually I'm partially loaded and driving 75-80mph, 16-17mpg. 12-15mpg hauling my 11' Bigfoot camper, about the same pulling my 38' 5ver. Really depends on the wind, especially with the slide in.
Jerry