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At what temp do you plug in your heater?

52K views 34 replies 24 participants last post by  Codeman05 
I plug in at anything below 0 Celsius(32F) but ive found that the truck starts much better with a full synthetic oil(rotella 5w40 is what i run) which I have run since I got my truck. but my truck starts much better than are work trucks that run a standard 15w40 oil at low temps.
 
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