I have a stock 2022 Ram 2500 Crew Cab Short Bed 4x4. I have about 4,000 miles on it.
On long highway trips, the best I've seen is 14.6mpg (calculated).
Around town I'm usually in the 10-11mpg range.
Towing my 7,200 pound trailer I get 7.9mpg.
I have a 31 gal tank, so my driving around town...