2015 Cummins no start.

Dawizman

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The comment I was referring to was that now that he is running synth oil, he no longer needed to plug it in down to -30. I get it if you don't have access to power, but to start diesel trucks below -20 regularly isn't easy on them. It isn't easy on a gasser. Just because it starts, doesn't mean it wants to.
I agree. I plug mine in as soon as we get below zero. It's on a smart plug, so I can set schedules from my phone depending on how cold it is. I run a high quality synthetic oil, and it starts every time at -40°, however it is much better for the engine to have oil flowing smoothly, and it helps it warm up the cab a lot faster being plugged in as well.
 
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