
12-29-2013, 01:27 PM
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CC Member
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Join Date: Oct 2000
Location: Crystal Lake,
IL
Cobra Make, Engine: Everett-Morrison, 434 cid
Posts: 977
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Not Ranked
SAE defines the measurement of the viscosity.
Viscosity is defined or determined by the molecular weight.
Mineral oil molecules are not all the same. The molecules vary in structure, size, and weight. It is the average weight that determines viscosity.
Synthetic oil molecules are all identical.
Last edited by scottj; 12-29-2013 at 01:30 PM..
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