Vehicle: 2011 F150 FX4 Screw, 5.0L, 3.73, 6.5'.

Pulled our '07 Trophy 2502 WA w/twin 150 o/b's 165 miles, no issue other than it was a high / gusty wind day and was aware it was back there in crosswinds. And would have felt that with previous F250 SD 7.3L. Note:this boat just clears our 10'3" barn door. As stated by others, plenty of power (actually accelerated better getting on e-way with same load than SD 7.3L), just more up/dn shifting on total trip. Boat, motors, trailer, part fuel load probably put weight around 7,500#s+. Fuel use around 10 mpg, Diesel was around 11.

Also pulled a Ford 641 with front loader and ground equip. on a steel flatbed (5,500 - 6000# load) 225 miles at 65 getting about 12.3. The next 40 miles were sharp curves (20-25 mph) with a lot of short close coupled steep hills (a great bikers road) and it dropped to about 11.0. Powered through it fine.

On e-way road trips with out a load at 72-5 it's around 18.5, On 2-lanes at 55-60 steady seeing just under 20.

And don't forget to engage trail tow mode like I did 1st trip, it does seem to make a difference in pulling. I thought with a trailer with brake controller and info loaded it would auto engage - nope. My error, not the trucks.