I would like to say ever since I bought this rig and I changed all the filters I have been very happy with the mpg, the average is 20 to 23 mpg. Now granted my wife has been driving this truck to work and she is not hard on the gas pedal, I still find this to be very impressive mpg. I am hopping to go out to the Black Hills SD pulling my 35' travel trailer an then we will see how good of fuel mileage I will get. I'm hopping between 10 and 12 mpg and if I get more I will be very happy. What is some of you out there getting for mpg, pulling or non pulling?