I've got a 21 F250 w/ a flatbed and FWC Hawk UTE on it, 37's and a Carli 2.5" lift and we just passed 15,000 miles. On an awesome day, we get 11 MPG. Average is 10, crawling around offroad around 9. The engine has more than enough power and torque, never find myself wanting for more, even with...