Lubricating oil composition
AssigneeEneos Corporation
InventorsHideo TSUNEOKA, Shintaro KUSUHARA
Life of this patent
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Abstract
Disclosed is a lubricating oil composition. The lubricating oil composition contains a lubricating base oil including mineral base oil, 4 to 15 mass % of an ester compound of a monovalent or polyvalent aliphatic carboxylic acid and a monovalent or polyvalent aliphatic alcohol, 400 to 1200 mass ppm of zinc dialkyl dithiophosphate in terms of a phosphorus element, 500 to 3000 mass ppm of a calcium-based detergent in terms of a calcium element, and 50 to 1000 mass ppm of a boron-modified succinimide-based dispersant in terms of a boron element, on the basis of the total amount of the lubricating oil composition.
Claims4
A lubricating oil composition, comprising:
- a lubricating base oil including a mineral base oil;
- an ester compound of a monovalent or polyvalent aliphatic carboxylic acid and a monovalent or polyvalent aliphatic alcohol;
- a zinc dialkyl dithiophosphate;
- a calcium-based detergent;
- and
- a boron-modified succinimide-based dispersant,
- wherein;
- a content of the ester compound is 4 to 15 mass % based on a total amount of the lubricating oil composition;
- a content of the zinc dialkyl dithiophosphate is 400 to 1200 mass ppm in terms of a phosphorus element based on a total amount of the lubricating oil composition;
- a content of the calcium-based detergent is 500 to 3000 mass ppm in terms of a calcium element based on a total amount of the lubricating oil composition;
- and
- a content of the boron-modified succinimide-based dispersant is 50 to 1000 mass ppm in terms of a boron element based on a total amount of the lubricating oil composition.
Dependencies are inferred from the claim text.