| 摘要 |
PROBLEM TO BE SOLVED: To provide a four cycle engine oil for two wheelers which has fuel economy saving properties and clutch slip preventing properties. SOLUTION: This four cycle engine oil composition for two wheelers contains a lubricant base oil and, based on the total amount of the composition, (A) 30-1,000 mass ppm of an organic molybdenum compound based on the amount of molybdenum element, (B) 0.05-0.15 mass % of a zinc dithiophosphate based on the amount of phosphorus element, (C) 10 mass % or less and 1.0 time or more the amount of the organic molybdenum compound based on the amount of molybdenum element of a succinimide-based ash-free dispersant based on the amount of nitrogen element and (D) 0.005-0.2 mass % of at least one selected from phosphates, phosphites and their salts. |
