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Apologies, but I can't answer this question definitively. I have no intention of burning WMO in my rigs, unless that is all that becomes available. As such, I have not researched this. But, I'm not sure why you couldn't.

Cold Weather Motor Oil Recommendation Apologies for diverting off of the OP's original question, but I believe this is cogent to his apparent desire to find ways to improve cold weather operation of his vehicle. This is almost pure opinion, so please take it for what it's worth, especially...