It was not all about the MPG, it was how it pulled it. Had no problem keeping 70, 75 MPH on way home, that is the speed limit where I was. The Damn EPA has hobbled the MPG on diesel trucks with all the smog crap. If a person deletes the crap they get over 20 MPG. BUT illegal to do so. Got up to 85 MPH at one point getting out of trouble with some dick head semi drivers. Just pushed the loud peddle to the floor and good buy truckers!