I know this is an older thread but I want to add my 2 cents because I am sick of people bashing the 6.0. I love my 2005 F250 6.0 that carries my Hawk and has 100,000 miles on it, but several things must be done to make it a reliable motor. The plastic STC fitting on the high pressure oil pump will fail (at least on 2005 models-not sure about other years), which will require a major tear down of the motor. This part is now redesigned to be reliable. While it's apart, have the egr cooler replaced with a Bullet Proof Diesel cooler, and if you want total piece of mind, have the head gaskets replaced with ford gaskets and ARP studs. BTW, In California, i didn't have the option of the EGR delete since we have smog checks for diesels now. The injector issue is mainly due to low fuel pressure-there is something called the blue spring mod (about a $60 part) which raises the fuel pressure to about 60 psi, and as long as the oil is changed frequently (use Rotella T6), the injectors are not an issue. The other issue that a lot of people don't know about is that the Ford "gold" coolant is bad for these motors. It gels in the egr cooler causing a chain reaction of failures that can ultimately cause head gasket failure. Switch to a ELC CAT 1 rated coolant and add a coolant filter. My truck IS tuned and gets relatively good mpg, even when loaded and driven hard. I can easily stay in the fast lane on uphill grades and passing is not an issue, even when loaded with lots of gear and the camper. Besides the engine "bulletproofing",and a rebuilt fuel injector control module (which failed when I let the batteries die) the truck has been totally reliable. If you can buy a clean 6.0 and spend about $7K on the repairs I have mentioned, you will have an awesome truck at a much cheaper price than a new one.