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; and (B) a phosphite ester compound represented by the following general formula (1) in an amount of 0.01 to 0.06 mass% in terms of phosphorus on the basis of the total mass of the composition:
wherein in the general formula (1), R1 and R2 are each independently a C5-20 group represented by the following general formula (2):
wherein in the general formula (2), R3 is a C2-17 linear chain hydrocarbon group, and R4 is a C3-17 linear chain hydrocarbon group, and X1 is an oxygen atom or a sulfur atom.
一种润滑油组合物,包括:润滑油基础油;(A)
水杨酸钙清净剂,以组合物总质量计算,
钙的用量为 0.005 至 0.03 质量%;以及 (B)
亚磷酸酯化合物,由以下通式 (1) 表示,以组合物总质量计算,
磷的用量为 0.01 至 0.06 质量%:
其中,在通式(1)中,R1 和 R2 各自独立地为由下式通式(2)代表的 C5-20 基团:
其中通式(2)中,R3 是 C2-17 直链烃基,R4 是 C3-17 直链烃基,X1 是氧原子或
硫原子。