As others have stated, there is no comparing towing with a diesel to a gasser, it is a wonderful experience. That said, the diesel does require more maintenance and is more expensive for things like oil changes and repairs. I have the 6.4 ford PSD and it is a daily driver. mine has the smoking issue that some get. that is another story for another day. The diesels need an oil change every 5000 miles at around $100 each time (they take 15 quarts of oil).. They need a fuel filter change every 10,000 miles, that will be another $80-110 each time. You should drain the water from the fuel line monthly. Not sure about the 6.0 but the 6.4 and newer require Cetane boost to be run with every tank of fuel. For more info on the trucks visit...
ford truck enthusiasts or
the diesel stop