In my 06 QC I get 14.5 city and 18.5 highway. I also get 12.9 pulling a heavy boat to the water. The overhead used to be very off on the mileage till I took it back to dodge. Because the temp would read -40 most of the time. They reflashed the computer now the temp and mileage is pretty much right on. Something you guys might want to have done.