Just Picked one up on Thursday. 2016 159" 2500 hightop gasser. First trip home I saw 19.56 MPG calculated at the pump mostly highway about 300 miles and 60-70 hilly town driving. Couldn't be happier so far. hoping to do a simple camper conversion for me the wife and 2 kids. first up seats , than side glass. Happy to be here and looking forward to learning.