LUBRICATING BASE OIL FOR TWO-CYCLE GASOLINE ENGINE AND LUBRICATING OIL COMPOSITION FOR TWO-CYCLE GASOLINE ENGINE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a two-cycle gasoline engine oil excellent in cleanness, therefore capable of maintaining two-cycle gasoline engines at high performance levels over a long period. ;SOLUTION: This lubricating base oil consists mainly of a base oil with a dynamic viscosity at 100C of 4-20 mm2/s, viscosity index of 75, condensed polycyclic aromatic hydrocarbon (DMSO extract) content of 0.1 wt.%, and sulfur content of 1.0 wt.%. The lubricating oil composition is obtained, as necessary by incorporating 100 pts.wt. of the above base oil with 0.1-2.0 pts.wt. of a phenolic antioxidant.;COPYRIGHT: (C)2000,JPO