Current 2019 diesel ZR2, coming from a 2008 Dodge Power Wagon w/G-56 manual 6 speed.
From 6-10 mpg, empty or towing 10,500 lb, didn't matter.....to 13-25 mpg with the ZR2 diesel. 2x the mpg towing the same 4000 lb camper, 13 vs 6.
The ZR2 certainly is smaller than the PW but so are the repair...