my 2021 limited, with 10k miles, average 15.5-16.0 mpg around town, 21mpg on freeway at 65. I'm all stock on 22" rims, except for my tires are the toyo open country at 3, 285/50/R22. I did a scan and found the error code P2C44, related to the auxiliary battery for the powerboost hybrid system...
I bought a used 2021 Limited with 9800 miles. During test drove, I saw 18mpg from the trip 1 with few hundred miles. I took the truck home, drove 200 miles in 1 week with a full tank of 87 octane gas, and hardly slamming the gas pedal, i'm averaging 15.5 mpg. On some short trips, under 6 miles...