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First, I would be worried about having enough oil where it needs to be during cold startups. I'd also run a thinner oil if I lived in an extremely cold climate to get oil on the bearings as fast as possible to keep my bearings alive. The temp of the oil will probably rise quickly due to...

1 qt is part number 11487 at the local store if they have it. More than likely they will have to special order it. I called Royal Purple and the tech guy said that it was supposed to have about 1800ppm zinc. I ordered a case to try it out in a new flat tappet cammed motor I'm breaking in. We'll...