Lubricating oil composition
    5.
    发明授权

    公开(公告)号:US11193080B2

    公开(公告)日:2021-12-07

    申请号:US16826711

    申请日:2020-03-23

    摘要: The present invention relates to a lubricating oil composition containing a base oil (A), a molybdenum dithiocarbamate (B), an ester-based ashless friction modifier (C), and a metal salicylate (D), wherein the content of a molybdenum atom derived from the molybdenum dithiocarbamate (B) is 650 ppm by mass or more on the basis of the whole amount of the lubricating oil composition; a content ratio [C/BMo] of the ester-based ashless friction modifier (C) to a molybdenum atom derived from the molybdenum dithiocarbamate (B) is 5.0 to 10 in terms of a mass ratio; the content of a salicylate soap group derived from the metal salicylate (D) is 0.50% by mass or more on the basis of the whole amount of the lubricating oil composition; and a kinematic viscosity at 100° C. is 4.0 mm2/s or more and less than 9.3 mm2/s, and a high-temperature high-shear viscosity at 150° C. is 1.7 mPa·s or more and less than 2.9 mPa·s. In accordance with the present invention, a viscosity-reduced lubricating oil composition in which nonetheless a molybdenum dithiocarbamate and an ashless friction modifier are jointly used, not only friction can be reduced early after commencement of lubrication, but also such a state can be maintained, is provided.

    Engine oil composition
    6.
    发明授权

    公开(公告)号:US11118128B2

    公开(公告)日:2021-09-14

    申请号:US16471704

    申请日:2018-01-22

    申请人: ADEKA CORPORATION

    发明人: Taro Sumi Shinji Iino

    摘要: A fuel-saving-type engine oil composition is provided that exhibits a satisfactory friction-reducing effect in a low-viscosity engine oil without being constrained by, for example, high temperatures, low temperatures, low loads, or high loads. The engine oil composition includes: an engine oil having a low-temperature viscosity of from 0 to 10 in SAE viscosity grades and a high-temperature viscosity of from 4 to 20 in the SAE viscosity grades; and a molybdenum compound (A) represented by the following general formula (1): where R1 to R4 each independently represent a hydrocarbon group having 4 to 18 carbon atoms, and not all of R1 to R4 represent the same group, and when R1 and R2 represent the same group, R3 and R4 do not represent the same group, and X1 to X4 each independently represent a sulfur atom or an oxygen atom.