PURPOSE: To provide a lubricant composition preventing formation of carbonaceous material, etc., within an engine by adding specific calcium and magnesium hydroxyalkylsulfonates.
CONSTITUTION: This lubricant composition comprises a lubricating oil, a main composition, and a small amount of an alkaline earth metal salt selected from a calcium or a magnesium salt of hydroxyalkylsulfonic acid shown by the formula. In the formula, each R1, R2, R3, and R4 independently represents a hydrogen, or a linear or branched alkyl with a condition that the total of these carbon atoms is within a range of 8-30. As the salt of the acid to be used and shown by the formula, calcium is preferable. And, it is preferable that at least one of R1 or R2, and at least one of R3 or R4 represents alkyl group. As a lubricating base oil to be applied, a mineral or a synthetic hydrocarbon lubricating oil is preferable, but an ester lubricating base oil or a vegetable oil is also applicable.
KURISUCHINUSU KORUNERISU FUAN
RUDORUFU RIKARUTO FUAN UERU
MINNE BOERENSU
YOHAN SUTAPERUSUMA
