My gaser gets 12 mpg unloaded and around 10-9 loaded with my 4 place enclosed. Plus it has 230,000 miles on her. Figure if I'm going to get a different truck, I'm going for the powerstroke. I really like this truck, and I've heard around 19mpg loaded or not, so that alone will even things out.
Deisel fuel will go down in the summer. It is higher now because of the winter mix. (From what I am told anyway)
This truck has the dually's and is a crew cab long box so it should be more stable towing as well.
This 2001 has 199,000 miles and are asking $14,000 for it. There is also a 1997 crew cab short box, same motor about the same cost with 92,000 miles. But I really like the dually though. Makes the 97 look small and old. lol