I have a F150 with the 3.5 ecoboost and it'll tow more than it should (worried about stopping and control) and I get it that towing you'll use more gas, but this thing uses TONS of gas. I haven't checked the mileage manually, because I don't really want to confirm my suspicions, and the accuracy of the computer mileage. The range of the fuel tank is extremely anoying when towing and proibably around 250 miles or so (withoug getting the gas light). That's my main gripe with the F150. I'm thinking of going back to a 3/4 or 1 ton, and I like desiel for the power, but from everything I've heard with the new emissions, it's not great for the motor and systems for stop and go, or errand type driving. The motors perform best when being run at higher temperatures, under load for a long time, which is when the desiel really shines, but the reality is, that's not most of my driving. Realistcally out of the 20k miles per year driving, I might be towing something 5-6k miles, which isn't really that much and should probably save the $10k and get gas....it'll have the biggest gas tank I can get in it for sure.