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.

EXACTLY, but have you ever had hand calculated mileage on your Ford better than the computer showed? I'm talking filling to the top same pump.