How many miles a year?

I have a 2005 Dodge 2500 pull a 5th wheel and boat around a fair amount and its just now nicely broken in 105 K (bought it new). If I was running a gasser I would start worrying about whats going to go out next. Oil changes 49.95 at the dealer every 7500 miles, fuel filter every other oil change. For towing I like running a diesel and will pay the extra costs for the benefits. It really comes down to what you want, both will do the job just fine. Any money you save in fuel milage you will give right back in services. If I was buying a truck tomorrow it would be a Dodge 2500 cummings diesel.