MPG on a 2013 Ram 3500 Dually

Here you go Ray :B Towing mileage might be lacking since Ram dropped the ball with the towing package and lack of hitch availability. Hopefully they will have the brackets soon so NC can pull his 5er home someday :B
Seems like many are in the 20 range non-towing with the 3.42's.

Fuel mileage. I get 7.4 mpg in my MH. If it drops 7.3 I'll stop RVing. In a pigs eye. I'll keep putting fuel in until I run out of money or stay parked longer. Mileage doesn't matter. :B

Just averaging all my local driving with 4:10 I get about 18. As I understand the fuel economy got better since 2005 and with 3:42 gears I would think 20-22 would be about right. As for towing 10-12. JMO

Depends on how much weight your pulling but something closer to 12 is normal with the newest versions of the 6.7.

Expect 9-10 towing maybe 18 empty and you won't be disappointed