[PaulB2]

I have the same truck, a 2014 (I think) 1500 with 3.21 rear and the V6 (sweet engine, by the way) and the 8-speed box. Mine is a 2wd though.

It's rated at 25mpg (US) on the highway, and I think I can better that with some mild hypermiling. Towing a trailer knocks that way down (14 or so), as does driving in town.

The gas consumption display is very nice in this truck, better than a scan guage in my opinion because you see a bar graph for the instantaneous mpg, so the feedback is as good as it gets.

Mine is too tall; I don't need that height in a 2wd truck. Some day I may lower it a bit.

Putting in a half-tonneau is very easy if you have a RamBox as I do. Supposed to help on the highway...