2024 Duramax Fuel Mileage Comparison. A camper is in my future plans. Even though the epa does not require fuel economy testing for these trucks, the duramax is known to be quite fuel efficient compared to the cummins and power stroke.

Going next week to order my truck, and i’m seriously torn on which to get. Looking at a new 2024 at4 and just curious if the 10 speed transmission helps with mpg.