Lubricating oil composition

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and...

Reexamination Certificate

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C508S591000, C508S291000

Reexamination Certificate

active

07867955

ABSTRACT:
A method of reducing the occurrence of ring-sticking in an internal combustion engine in which the crankcase of such an engine is lubricated with a multigrade crankcase lubricating oil composition containing 1 to 15 mass %, based on the mass of the oil composition, of a non-hydrogenated olefin polymer having a number average molecular weight in the range of 100 to 5,000.

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