I get 16 mpg out of a 00 Dodge Ram 4x4 2500 with 5 speed (NV4500) and 4.10 gears. People whose opinions I trust get more but have higher gears. I'm stock but chips, injectors, tire size & engine/truck speed all have a large impact.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.