Fuelly mileage of the big three diesels
It appears the new 10 speed in the Fords made a significant impact in catching up with the Cummins fuel mileage in the 2500's. Although it is still too little info in all of the new 2020 models to te...
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^ Likely because the early tier IV issues bit them, just like everybody else. And about the time they were able to upgrade, the emissions systems had gotten markedly better.
