Actual measured consumption since my truck was new in early November:
The dash claims it's a bit higher, but I'm too lazy to go check exactly what Trip B (which has never been reset since new) shows.
This is a 2021 Laramie with stock 18" wheels & tires, 3.21 gears. Primarily highway miles where I consistently set the cruise to 10 over, so most often 80, less often 75. The bed is generally full of stuff, but under a tonneau cover, and there's usually one or two passengers on board as well. No towing, virtually no true city driving, but some suburban and country roads, as well as some dirt roads.