I switched last year from towing my 30' 7000# TT with my wifes Ford Expedition (5.4 V8), to my new to me 2008 Dodge 2500 with a 6.7 Cummins 6sp auto. The Expedition did a fantastic job. Wasn't going to win any uphill drag races with it, but handled many years of towing with ease. The Dodge though, no contest. The ease in which the Cummins tows the trailer is amazing, and unlike the 5.9's, which are undoubtedly bulletproof, there is no diesel drone. Its as quiet as heck in the cab. We take the same trip from New Brunswick, Canada to Loudon, New Hampshire for the Sprint Cup Races every September, and keep receipts just to keep track of fuel burned. (Dunno why, just to torture ourselves I guess!LOL) With the Expedition, we burned approx. $300 U.S. in fuel round trip at 55 mph. Last year with the Cummins, $280 U.S. in fuel at 65 mph. Pretty comparable pricewise, due to the higher price of diesel vs gas, but the ease that the diesel tows is incredible, and honestly, its so much more relaxing towing with the Dodge. I would have no issues towing again with a gasser, but now that I have a taste of a diesel, you'd have a hard time getting me to switch back!
