TwinTurbo.NET: Nissan 300ZX forum - Those tid bits of data can be misleading
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Subject Those tid bits of data can be misleading
     
Posted by Ashman2k2 on November 10, 2015 at 11:25 AM
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In Reply To I'm curious, where does that rule come from? posted by ttsmokin on November 09, 2015 at 06:19 PM
     
Message Remember that we have an open system, so the lower the viscosity, the faster the hydrodynamic film of oil can squeeze out of the sides of the bearings. The 20deg rule of thumb is to maintain the same viscosity if you compare the two different SAE grade oils at 20deg difference.

     
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