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US 12,391,897 B2Granted
Lubricating oil composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKenji Sunahara, Shoichiro Fujita
Life of this patent
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Abstract
A lubricating oil composition, containing a base oil (A), a metal-based detergent (B), and a molybdenum compound (D), the lubricating oil composition having a content of molybdenum atoms derived from the molybdenum compound (D) of 0.05% by mass or more, a base number of 4.0 mg KOH/g or more, and an HTHS viscosity at 150° C. of 1.3 mPa·s or more and less than 2.3 mPa·s.
Claims20
A lubricating oil composition, comprising:
- a base oil (A);
- a metal-based detergent (B) comprising a calcium-based detergent (B1) and a magnesium-based detergent (B2);
- and
- a molybdenum compound (D) comprising a molybdenum dithiocarbamate (D1), and a molybdenum dithiophosphate (D2) and/or a dialkylamine molybdate (D3),
- wherein a content of one or more selected from base oils classified into Groups 2 and 3 in the base oil category of the American Petroleum Institute (API) is 85% by mass or more, based on total lubricating oil composition mass,
- wherein the lubricating oil composition has a content of Mo atoms derived from the molybdenum compound (D) of 0.05% by mass or more, based on total lubricating oil composition mass,
- wherein the lubricating oil composition has a base number measured by a hydrochloric acid method of 4.0 mg KOH/g or more, and
- wherein the lubricating oil composition has an HTHS viscosity at 150° C. in a range of from 1.3 to less than 2.3 mPa·s.
5 more elements
A lubricating oil composition, comprising:
- a base oil (A);
- a metal-based detergent (B) comprising a calcium-based detergent (B1) and a magnesium-based detergent (B2);
- an ash-free friction modifier (C) comprising an amine-based friction modifier (C1) and an ether-based friction modifier (C2);
- and
- a molybdenum compound (D),
- wherein a content of one or more selected from base oils classified into Groups 2 and 3 in the base oil category of the American Petroleum Institute (API) is 85% by mass or more, based on total lubricating oil composition mass,
- wherein, if the lubricating oil composition comprises the amine-based friction modifier (C1), the lubricating oil composition has a content of the amine-based friction modifier (C1) of more than 0.05% by mass, based on total lubricating oil composition mass,
- wherein the lubricating oil composition has a content of Mo atoms derived from the molybdenum compound (D) of 0.05% by mass or more based on the total lubricating oil composition mass,
- wherein the lubricating oil composition has a base number measured by a hydrochloric acid method of 4.0 mg KOH/g or more,
- wherein the lubricating oil composition has a (C1)/(C2) mass content ratio of the amine-based friction modifier (C1) to the ether-based friction modifier (C2) in a range of from 0.20 to 1.00, and
- wherein the lubricating oil composition has an HTHS viscosity at 150° C. in a range of from 1.3 to less than 2.3 mPa·s.
8 more elements
Dependencies are inferred from the claim text.