My company (me) have bought 6 6.0's and one 6.4 (my truck).

Done with Ford.

My truck is currently at Jarnigan's with the engine out and cab off. Replacing radiator, front engine cover, and rear main seal. Truck has been babied and never pulled anything heavier than a 4 wheeler.

12 mpg.

All my 6.0's have had 2-4K worth of work on them.

Looking for replacements now. With the price of diesel, gas is looking better.