My grandpa's Ram gets better than that towing a 3,000 pound trailer with a 6,000 pound Yukon XL behind it. 21mpg.
But it does have the cyclinder shut off. (don't know if that would kick in when it was towing something.) And, for about 10 miles, there was a big downhill slope. I'm hoping that number will shoot up with the introduction of the cyclinder shut off system in the 2011's. SRT8's are supposed to get 25mpg. Sweet.
It could be worse. we could all be driving 96 Dodge Rams that get 12 mpg on a good day