Hell you don't even get a tshirt until 200...Makes me want to call up JK and get 200mph capable tune, and make a trip out west...JK can a stock Duramax be fueled (and tuned) to make enough HP for the task?
As for the B20 claims, my guess is either 1) the warmed up truck (diff fluids, transmission fluid, engine underhood temps) had less parasitic drag and/or made better horsepower on the return run, 2) they picked up a slight tailwind, rather than bucking a headwind, 3) or a little bit of both.
No reason that B20 would make more power that I can see, all other factors being the same. Who knows, maybe they sandbagged a bit to acheive the results they wanted - to promote B20.
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