I have a Dodge 5.9L 2500 diesel - 24 mpg overall(not towing), but I do have a manual transmission unlike most. 18-20 when towing a prostar, 16 when pulling 10000 lbs of camper. 610 lbs of torque with no mods, I'm sure the new models are all better than my 2005.
Originally Posted by onejdgreen
Like Kgrove said, we need to know what your budget is, towing distance, terrain, etc. I have towed 2 miles to 2,000 miles with 1/2 ton to 1 ton and everything inbetween. My vote is a 3/4 ton Diesel. More power than you know what to do with, no embarassing moments at the ramp because you cant pull the trailer up, seen that quite often... Great mileage for pulling, I get 18-20 pulling my 197, of course there is nothing stock with my engine either. That is another plus if your a gear head, diesels are relatively easy to get more out of.