Abstract: A lubricating oil composition contains a base oil (A), a zinc dithiophosphate (B), and a sarcosine compound (C), the composition having a content of the sarcosine compound (C) of more than 0.05% by mass and 0.40% by mass or less based on the entire amount of the lubricating oil composition, and satisfying requirement (?) or (?): Requirement (?): when the content of the sarcosine compound (C) is more than 0.05% by mass and less than 0.20% by mass based on the lubricating oil composition, one or more phosphorus compounds (D) selected from an acidic phosphoric acid ester (D1) and an amine salt thereof (D2) are optionally contained; Requirement (?): when the content of the sarcosine compound (C) is 0.20% to 0.40% by mass based on the lubricating oil composition, the phosphorus compound (D) is contained in an amount less than 0.50% by mass based on the lubricating oil composition.

Abstract: The present invention relates to a lubricating oil composition and a continuously-variable transmission filled with the lubricating oil composition. The present invention also relates to a friction control method for a continuously-variable transmission, the method using the lubricating oil composition. This lubricating oil composition is characterized by containing: (A) a base oil; (B) a diamine; (C) a glycolic acid amide; and (D) a phosphorous ester. With this lubricating oil composition, it is possible to provide different wear characteristics between different parts, so in a preferable embodiment of the present invention, the lubricating oil composition is suitably used as a lubricating oil for variable transmissions, in particular, metal-belt continuously-variable transmissions.

Abstract: The present invention relates to a lubricating oil composition and a continuously-variable transmission filled with the lubricating oil composition. The present invention also relates to a friction control method for a continuously-variable transmission, the method using the lubricating oil composition. This lubricating oil composition is characterized by containing: (A) a base oil; (B) a diamine; (C) a glycolic acid amide; and (D) a phosphorous ester. With this lubricating oil composition, it is possible to provide different wear characteristics between different parts, so in a preferable embodiment of the present invention, the lubricating oil composition is suitably used as a lubricating oil for variable transmissions, in particular, metal-belt continuously-variable transmissions.

Abstract: Provided by the present invention is a lubricating oil composition having a low friction coefficient (traction coefficient) and a superior fluidity at low temperature, suitable as a transmission oil including an automatic transmission oil, by using a base oil which contains a mineral oil satisfying the conditions that (1) kinetic viscosity at 100° C. is in the range of 5 mm2/s or more to 8 mm2/s or less, (2) viscosity index is 130 or more, and (3) % CP by a ring analysis (n-d-M method) is 80 or more.

Abstract: A lubricating oil composition, which contains a base oil, a boron-containing bisalkyl succinimide, a boron-containing bisalkenyl succinimide, or both, an amide, and a dispersed polymethacrylate. The lubricating oil composition is used for transmissions, such as Dual Clutch Transmissions.

Abstract: Provided by the present invention is a lubricating oil composition having a low friction coefficient (traction coefficient) and a superior fluidity at low temperature, suitable as a transmission oil including an automatic transmission oil, by using a base oil which contains a mineral oil satisfying the conditions that (1) kinetic viscosity at 100° C. is in the range of 5 mm2/s or more to 8 mm2/s or less, (2) viscosity index is 130 or more, and (3) % CP by a ring analysis (n-d-M method) is 80 or more.