Originally Posted by RockyMtnMike
My Mother In-Law and her husband used my discount to buy a loaded down Larmine 3500 Dually with the 6.7L and they love it. This truck kicks ass, it has every option on it except a sunroof. They pull a very big 5th wheel and travel all over the U.S. He hasn't had any problem with it and they both love it. They just made the trip from CA back to MI and back down to FL. I'll have to give him a call tonight and ask him about mpg.
I just talked with my inlaws and they said they are getting 16 in the city w/o the 5th wheel and while towing it on the highway they have been getting around 17mpg.