I've got 16,000 on my 21 Rebel, 3.92s, 5.7 hemi. Running 87 octane, if I baby it, avoid stop lights as best I can, and go really easy on the gas, I can get 16 to 16.5 MPG in town. On the Interstate it's about the same (@70 Mile per hour on very flat roads). I get the same mileage now as I did...