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  1. Sudden MPG drop- engine issue or winter diesel?

    So, my '23 Gladiator Sport S has been awesome. Especially in terms of mileage, even after putting on 33" tires I was getting 27-25 MPG. I have no other mods. 14K miles in 7 mos. In late October, my mileage started to drop like a rock. My average mileage has plummeted from 27-25 down to 20-21...




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