Oil viscosity numbers, and does "Winter" actually matter?

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Standards, Systems, etc. and their history ... not a simple or quick thing to resolve and/or devise.

Having said that, one of the better suggestions I've first read about on bitog was switching to xW-HTHS designation. Not sure if @Shannow invented it or what but I first saw it in one of his posts. It makes more sense than the current designation.
 
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^^^ For the most part, the higher the KV100 the higher the HTHS, except in some rare cases. I never use anything with less than 3.0 cP HTHS viscosity.
 
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