Additive for lubricating oil and lubricating oil composition containing said additive.

摘要

Disclosed herein is an additive for lubricating oil which comprises a zinc dithiophosphate, a compound having at least one hydroxyl group and carbon-carbon double bond in a molecule thereof and cuprous oxide. Also disclosed herein a lubricating oil composition which comprises a base oil for lubricating oil and the above-mentioned additive for lubricating oil. The aforementioned additive is particularly effective for improving color change to black, sludge formation, stability a against oxidation and anti-wear property for zinc dithiophosphate (ZnDTP)-compounded lubricating oil composition.