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Old 23rd May 2003, 09:32 AM
Cal Cruzer Cal Cruzer is offline
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Quote:
Viscosity is a range not an absolute number - and it can vary significantly from brand to brand within the same weight range. From SAE J300 revised June 2001, Engine Oil Classifications (Kinematic Viscosity (cSt) at 100°C):
Range or absolute,still, viscosity is viscosity. A 50 weight is more viscous than a 30 no matter who makes it and it takes more hp to pump a more viscous fluid. Even by thier numbers.
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