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0W-30 thicker than 10W-40?
Posted to Technical Discussion Forum on 7/10/2010 22 Replies

Motor Oil Viscosity -- How can a 0W-30 be thicker than a 10W-40?

For several years I've been using the example of an ACEA A3/B3 rated 0W-30 that is required to be thicker in high temperature dynamic viscosity than a 10W-40 is required to be.

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