Duramax vs Power Stroke Fuel Economy Tow Test and Drag Race

4x4ord wrote:
The problem with doing mileage tests over a short distance like this is that if during the test the Duramax happened to do a DPF regeneration and the Ford didn't the results are meaningless. I think it takes roughly a gallon of fuel to clean the DPF so on a run where only a few gallons of diesel is required the mileage result could be way off.

I thought about that but if a truck did do a regen I think the mpg delta between these two trucks would have been greater. Plus towing this much weight there should have been passive regen working in their favor.