I am 6 weeks in to towing with my 2015 F150 Ecoboost with Max tow. Went to the scales scales and trailer is right at 8,000 pounds. The truck with 36 gallons of gas, hooked to trailer with WDH, all our crap and wife and I came in at being under max weight by 250 pounds. Payload is 1,655 and we weighed about 1,400 and some change. All my numbers were safely within limits of truck.
Started in Florida and currently in Breckenridge, Colorado and I have to say the truck has been a pleasure to tow with. Transmission holds speed on declines well but the one option I would like is the engine brake. I am averaging about 10 mpg driving at 62-63. Climbing it rarely goes above 2,000 and on the steepest climbs it goes to 24-2,700 rpm and does not drop speed. Only time above 3,000 rpm is when going down steep declines and the trans is keeping my speed. Normal pulling is at 1,700 rpm. Downshifting is rare except on hard climbs.
Now all that being said, if I get a larger trailer then I would upgrade a a 3/4 ton diesel. But for what I have now, I am very happy with this truck trailer combo.
Mark and Joanne
2014 Fun Finder XT 276
2015 Ford F150 Lariat 3.5 Ecoboost 4X4 SCrew Max Tow
2011 Harley Road Glide Ultra