I have just under 12K on mine. The 3.7L is plenty powerful enough to move my cargo. Payload ranges from 350 lb to over 4000 lb on occasions. I kinda wish I had the 4.10 rear axle, but I like the transmission a lot. I'm sure the Diesel and EcoBoost are a hoot to drive, but I don't consider 275 hp to be slouchy. The engine needs more revs than the others, but the powerband is quite flexible. With the kind of cargo I haul, much more power would just throw stuff all over the truck.