For what it is worth, another data point.
Driving back and forth to work (16 miles), I'm just about at 13mpg.
Took a little trip with the truck today... 3 adults in the truck and some odds and ends.
Close to 140 miles, about 80 miles or so on the Interstate and about 55 miles on State Roads with minimal in town driving.
Kept the truck at 70 mph the entire way up gassed up on the way out, 138.4 miles 16.25 mpg.
Kept the truck at 75 mph the entire way back home, gassed up just before hitting home, 135.9 miles 16.00 mpg
That's better than my 2019 Limited 1500...