I am hoping it will get better, I have yet to take it on a trip where I wasnt towing so have no real idea what kind of mileage it will get. I know my 2010 F 150 I could average right around 15 doing the same driving, I know for some reason the mileage drops in the winter both on GM and Fords. My son's have 1 GMC and 1 Ford Eco boost and they both complain in the winter.