I'm thinking about getting one. I know the mpg wont be great but I'm only getting about 7.5 with my Dodge 6.7 diesel. The Dodge does good for a truck on the hwy empty, but I have a 8.5X20 enclosed behind it most of the time. Avg mpg is 11.1. I'm done with diesel, with all the emissions junk they are putting on them it kills the mpg and causes other problems. So, does anyone pull an enclosed trailer with a 2500HD 6.0? How does it it do and what is your mpg?