| 摘要 |
PURPOSE:A lubricating oil composition having improved oxidation prevention for internal combustion engine, wear prevention and metal corrosion resistance, obtained by blending a base oil with a specific organomolybdenum compound, a specific zinc dialkyl dithiophosphate and a metallic cleaning dispersant, etc. CONSTITUTION:The aimed lubricating oil composition obtained by blending a base oil consisting of a mineral oil and/or a synthetic lubricating oil with (A) 0.005-0.2wt% calculated as molybdenum concentration of a compound shown by formula I (R1 is 5-8C secondary alkyl; X is O or S and O/S=3/1-1/3), (B) 0.2-1.5wt% compound shown by formula II (R2 and R3 are alkyl, alkenyl, etc.), (C) 0.2-20wt% one or more metallic cleaning dispersants selected from excessively basic calcium sulfonate, excessively basic calcium phenylate and excessively basic magnesium sulfonate and (D) 1-10wt% alkenylsuccinimide (boron compound) and/or benzylamine type compound as essential components. |
