My MPG is really bad. I got average around 15-17 MGP!!!! I got my P5 auto tranny 3 months ago. It had 64900 Miles on it. It has been running very good. No CEL. I put less than a thousand miles in 3 months mixing in city and highway (70:30) as i said i only got between 15-17 MPG. What i did is I...