Method for using lubricating oil composition and method for evaluating degradation

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United States of America

PATENT NO 12222344
APP PUB NO 20230057229A1
SERIAL NO

17759057

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Abstract

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A method for utilizing a lubricating oil composition in which the content of a metal-based cleaning agent (X) having a base value of 100 mgKOH/g or less is 630 mass ppm or less in terms of metal atoms, and the content of sulfated ash is 1.5 mass % or less. The method includes measuring at least one physical property value among the capacitance and the dielectric constant of the lubricating oil composition while using the lubricating oil composition, and evaluating the progress of degradation of the lubricating oil composition.

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Patent Owner(s)

  • IDEMITSU KOSAN CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kasai, Moritsugu Tokyo, JP 19 70
Kusumoto, Tatsuya Tokyo, JP 12 22

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