The f250 he talking about doesn’t get 17 either. But a 3500 dodge ram will, but that’s only highway. It’s gone be closer to 14 or 15. Source: Me. I’ve driven giant Fords, Chevys, and Rams for the better part of 20 years for work. Rams tend to be the best, strength and efficiency-wise, but they definitely do not get 17 mpg. Any of them.