i absolutley love my dodge with the commonrail cummins, it hauls :censored: and gets 21-22 mpg doing it. towing a 18ft trailer full of beech rounds i got 16-17mpg. however if i had to do over i would have bought a 12valve and stayed out of debt. i agree that the 7.3 is a good motor and they last forever, but they are slugs,as far as the 6.0 the early ones had all the problems but they got them lined out about the time they went with the current motor