I got suckered in 3 times.. 2007 on 35's and Thuren Goodies, 2019 on 35's and 2021 75th on 37's. My 2007 got as good mileage as the others if you can call it good. Roaming around eastern Montana is nerve-racking with the mileage they got. Any hint of wind or even towing a small 5x10 Cargo trailer and I got 8 MPG.... 14 would be a good day with wind behind me and no trailer. Its not so much the mileage its the size of the tank. (Sold my gladiator for the same reason) It really needs a larger tank as it was really more about range than MPG, It just wasn't worth it anymore. I chose gas due to cold weather and easy starts and knowing the PW would get me out of trouble if needed. I sold the PW and got a new F150 Tremor. 36 gallon tank and 15 MPG avg so far running 285/75/18's. Ford really upped the interior and sounds like the SD will get the same treatment next year. I should have kept the 2007... I would do another but would wait for some more fuel efficient options or a combo of larger tank/fuel efficiency.
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