"GM diesels best on fuel, Ford second best on fuel Cummings SUCK SWALLOW GULP ENHAIL Fuel lol."
That doesn't even make sense. Right off the bat, the 7.3 and the 6.9 take more fuel to even fire. It's all about the weight of your feet. I find the 600 Cummins is an exceptionally effecient engine. I'm getting around 15-17mpg in town. And NO V-8 can come close to producing the outright power of an inline 6. Just look at transfer trucks.
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Captain Jon
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