If the rig is parked in a garage, you can get condensate in the tank. Science in action.

Toss a bottle of Heet in there per the instructions. If EFI, use the red bottle, not the yellow one. Easier on the injector gaskets.

-20 and a quarter tank of fuel is askin' for trouble. If you break down, you're already in a shelter; keep that tank above a quarter tank when in extreme cold conditions.

Clogged EGR's like to stumble right around those RPM's as well.

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