| 摘要 |
PROBLEM TO BE SOLVED: To provide a lubricant composition for speed changer excellent in low fuel consumption by making low viscosity and excellent in abrasion resistance or seizure resistance of a slide part of aluminum alloy.SOLUTION: There is provided a lubricant composition for speed changer containing, on total amount basis of a composition, (B) boron-containing ashless dispersant of 50 to 250 mass.ppm in terms of boron amount, (C) at least one or more kinds of metallic cleaner selected from a group consisting of alkali sulfonate, alkaline metal salicylate, alkaline earth metal sulfonate and alkaline earth metal salicylate of 50 to 500 mass.ppm and (D) a phosphorus compound of 100 to 600 mass.ppm by the phosphorus amount in (A) a lubricant base oil having kinetic viscosity at 100°C of 1.5 to 4.5 mm/s, and having kinetic viscosity at 100°C of 6.2 mm/s or less. |
