I was specing out a new F-450 out of curiosity seeing as I can't find a good used F-450 4x4. You know what the 6.0 option is worth its 7000.000 dollars CND you want the torque shift thats another 1200 dollars. I usually only put 13,000kms per year on my truck (8000 miles) a 6.0 PSD isn't worth the money. A V-10 averages 10 mpg so my fuel cost would be 3,436 dollars for a year A 6.0 in a F-450 only gets 13mpg at most my fuel cost 2478 per year. Right now regular gas is 4.32 a gallon and diesel fuel is 4.03 a gallon just for kicks the price of propane is 3.33 a gallon. The fuel savings would take 7 years for it to pay for itself. Then the 6.0 costs more to repair good luck on getting 7 years of trouble free service out of it. I know some 6.0 Fords that have to go to the dealer almost monthly for repairs. I can see why a F-450 4x4 cab and chassis with a 6.0 PSD costs close to 47,000 dollars CND with the diesel option being 7000 dollars. I don't think I will be buying a new truck its not worth spending that kind of money on a truck that you really only get 4 years of reliable service out of.