Straight Weights = Multi-Viscosity Weights?

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I think I am beginning to understand why a straight weight...lets say 30 weight could meet a multi-viscosity weight too. For example let's use a straight 30 weight.... if tested, could also meet 10-30 weight....is this correct? Help me in further understanding this concept [Eek!]
 
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"I suspect some conventional SAE 30s might meet a 20w test." I'm sure you are right but I do not get to excited about a 20w/30 [LOL!] bruce
 
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quote:
Does an SAE 30 have a higher HTHS than a 5w30 or 10w30 ?
it could, typically and very generically speaking, it should. but it doesnt have to have a higher hths. i suspest come 10w30's have higher hths than some straight 30's.
 
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quote:
I'm sure you are right but I do not get to excited about a 20w/30.
There are only a few of us that do. [Freak]
 
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