This will be my daily driver. Fuel mileage is not that important to me because my round trip to work is only 2 miles. That being said I have heard some owners of the new 6.7 Cummins can get 20 mpg on highway. Of course don't have a lead foot. I had a job where I commuted 70 miles round trip. I would not own this truck if I did that still.Nice. I keep looking at those. But I got rid of our last pickup because I couldn't afford to feed the beast. Things have improved since then, but we're not quite there yet.