Quote:
Originally Posted by WP0ZZZ
Actually, viscosity decreases as temperature increases!
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No, the point here is that 10w-60 has a higher viscosity than 15w-50 at high temperature (i.e, the second number is the viscosity at 100 °C (212 °F))... Hence, the thicker grade oil at high temperature should seal better than the lower viscosity oil.
Cheers,
Humberto-