LUBRICATING OIL COMPOSITION AND METHOD FOR REDUCING FRICTION IN INTERNAL COMBUSTION ENGINES
First Claim
1. A lubricating oil composition comprising:
- (A) a lubricating base oil,(B) a molybdenum-based compound,(C) a metal-based detergent, and(D) an ester compound having one or more hydroxyl groups in a molecule thereof,wherein the metal-based detergent (C) includes (C1) a calcium detergent and (C2) a magnesium detergent, andwherein a content of the ester compound (D) having one or more hydroxyl groups in a molecule thereof is 0.03 to 1.20 mass % on a basis of the total amount of the lubricating oil composition.
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Accused Products
Abstract
A lubricating oil composition that hardly generates precipitation attributable to a molybdenum compound under the low temperature environment and is excellent in a friction-reducing effect under the low temperature environment is provided.
The lubricating oil composition is one including (A) a lubricating base oil, (B) a molybdenum-based compound, (C) a metal-based detergent, and (D) an ester compound having one or more hydroxyl groups in a molecule thereof, wherein the metal-based detergent (C) includes (C1) a calcium detergent and (C2) a magnesium detergent, and a content of the ester compound (D) having one or more hydroxyl groups in a molecule thereof is 0.03 to 1.20 mass % on a basis of the total amount of the lubricating oil composition.
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Citations
15 Claims
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1. A lubricating oil composition comprising:
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(A) a lubricating base oil, (B) a molybdenum-based compound, (C) a metal-based detergent, and (D) an ester compound having one or more hydroxyl groups in a molecule thereof, wherein the metal-based detergent (C) includes (C1) a calcium detergent and (C2) a magnesium detergent, and wherein a content of the ester compound (D) having one or more hydroxyl groups in a molecule thereof is 0.03 to 1.20 mass % on a basis of the total amount of the lubricating oil composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification