I do not know what is good or bad, but I am on a 6,000 Mile excursion and this is my MPG experience.
I am traveling from Tucson, AZ to Plainfield, CT and return. I am driving a 1997, 5. 9l Cummins, 250, 2x, 5spd std, #5 BD plate, stock pump and injectors, BHAF, 3. 51 Rear, HTT 62 x 12, and...