Eneos Corporation

Toyota Jidosha Kabushiki Kaisha

Yohei Susukida

Akira Tada

Noriko Ayame

Yasushi Onumata

Daisuke Tokozakura

Takatoshi Shinyoshi

Takahiro Fukumizu

A lubricating oil composition including: a lubricant base oil; (A) a calcium salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of calcium on the basis of the total mass of the composition; (B) a succinimide ashless dispersant in an amount of 0.005 to 0.25 mass % in terms of nitrogen on the basis of the total mass of the composition; (C) a nitrogen-containing antioxidant in an amount of 0.005 to 0.15 mass % in terms of nitrogen on the basis of the total mass of the composition; and optionally (D) a nitrogen-containing friction modifier in an amount of no more than 0.03 mass % in terms of nitrogen on the basis of the total mass of the composition, wherein a total content of any metallic detergent is 0.005 to 0.03 mass % in terms of metal on the basis of the total mass of the composition.

Lubricating oil composition

A lubricating oil composition including: a lubricating base oil; (A) a poly(meth)acrylate having a weight average molecular weight of no more than 50,000, in an amount of 2 to 10 mass %; (B) a phosphite ester of the general formula (1) in an amount of 0.01 to 0.06 mass % in terms of P; (C) a thiadiazole compound in an amount of 0.01 to 0.2 mass %; and (D) a Ca salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of Ca, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 4.0 to 20.0 mm/s, and a kinematic viscosity at 100° C. of 1.8 to 5.2 mm/s; and has a ratio [S]/[P] of 2.2 to 4.0, wherein the [S] represents a sulfur content, and the [P] represents a phosphorus content: wherein Rand Rare each independently a group having 5 to 20 carbons represented by the general formula (2); and wherein Ris a C2-17 linear chain hydrocarbon group, and Ris a C2-17 linear chain hydrocarbon group.

A cooling liquid composition including: a hydrocarbon fluid having a mass-based average carbon number of 13 or more and 16 or less in which a total amount of a hydrocarbon having 13 or more and 15 or less carbon atoms is 50% by mass or more relative to an entire amount of the hydrocarbon fluid.

Cooling liquid composition

A lubricating oil composition including: a lubricant base oil; (A) a triazole metal deactivator in an amount of 0.005 to 0.03 mass % in terms of nitrogen on the basis of the total mass of the composition; and (B1) a succinimide compound represented by the following general formula (1) in an amount of 0.0005 to 0.02 mass % in terms of nitrogen on the basis of the total mass of the composition: wherein in the general formula (1), Rand Reach independently represent a hydrogen atom or a C1-36 linear or branched chain alkyl or alkenyl group, and at least one of Rand Ris a C8-36 linear or branched chain alkyl or alkenyl group, and n represents an integer of 1 to 10.

A lubricating oil composition including: a lubricating base oil; (A) a poly(meth)acrylate having a weight average molecular weight of no more than 50,000, in an amount of 2 to 10 mass %; (B) a phosphite ester of the general formula (1) in an amount of 0.01 to 0.06 mass % in terms of P; (C) a thiadiazole compound in an amount of 0.01 to 0.2 mass %; and (D) a Ca salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of Ca, wherein the lubricating oil composition has a kinematic viscosity at 40&#xb0; C. of 4.0 to 20.0 mm/s, and a kinematic viscosity at 100&#xb0; C. of 1.8 to 5.2 mm/s; and has a ratio [S]/[P] of 2.2 to 4.0, wherein the [S] represents a sulfur content, and the [P] represents a phosphorus content: wherein Rand Rare each independently a group having 5 to 20 carbons represented by the general formula (2); and wherein Ris a C2-17 linear chain hydrocarbon group, and Ris a C2-17 linear chain hydrocarbon group.

Growing community of inventors

Tokyo, Japan

Yohei Susukida