I had a 01 7.3 and then got a 06 6.0. I have had nothing but pleasure with the new 6.0. It runs quieter, pulss better, gets better milage. I used to haul my towhauler loaded down to the same motocross track every weekend. With the 7.3 it took a 1/2 tank of fuel, with the 6.0 it took a 1/4 tank. Both trucks had the same size tank.