I gave my old F150 with the 5.4L to my son. It was doggy compared to the Ecoboost. The limit you hit is normally always the payload and rear axle limit and not the towing capacity. You can use the yellow sticker on the drivers door to get those numbers. Overloading the truck with the TT tongue weight plus gear and passengers is where it will run out of capacity.
I get about 11 mpg at 65 mph towing on mainly level roads. I think that is pretty good.
Originally Posted by Nightride
It's the 5.0 tow package with a max gvwr i think it's called of 13500 with the truck. The rv guy said i could pull even a bigger trailor but i think it's about the max. Haven't pulled a big trailor in a few years so just need some getting used to again. Any water in it and luggage would be over 7k easy. I think I'll tow it empty and fill with water when i get close. We will be doing mostly dry camping.