My last work trip to Denver I had a 2018 F-150 XLT with the 3.3L. I was actually pretty impressed with it. Up in the hilly roads, I did have to put the transmission in sport mode and had to rev the engine pretty high. Where it was flatter on the highways, it did pretty nice though. MPG was OK, but most of my trip was up in the hills on bad roads (revving high). I think it was somewhere around 16mpg. Down here in flat Texas, I think it would be just fine.