Our F150 is 2WD and has the 4.6 Triton. I have been overall pleased with this motor. It has enough pep to haul me, my pianos, and my piano trailer once or twice a week. When it pulls a trailer I can count on about 14 mpg. Not loaded about 18 and up to 21 even. I pulled a car trailer and an old car home from Montana and it did great! My only gripe is the plugs. I didn't have one blow but had symptoms and took it in and had plugs, wires, the whole shoot and match for about $900. I didn't want to take the chance of blowing a head. If you don't catch that stuff, it sounds like real trouble.
Pep, sometimes it almost feels like a heavier Mustang. Comfortable interior, 4 dr cab is a huge improvement over my older 2 door cabs.
Fix those darn plug problems! When closing the main door onto the extended cab door, it feels a bit flimsy.