TwinTurbo.NET: Nissan 300ZX forum - Yes. The big number of the two is the thickness at
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Subject Yes. The big number of the two is the thickness at
     
Posted by not4resaleZ on June 21, 2019 at 10:40 AM
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In Reply To 0w too thick? It's the thinnest there is(?) posted by Barry (NJ) on June 21, 2019 at 09:25 AM
     
Message operating temperature. The oil thickens as it cools from this temperature. The low number is an indication of how much the oil thickens from this high number thickness. An ideal oil would not thicken at all, so the ideal oil would be something like -100W40. I expect numbers lower than 0 to come out soon. (you pick your high number, that's a different discussion) Bob is the oil Guy has some good explanations of this stuff.

     
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