| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide lubricating base oil which can satisfactorily dissolve a lubricating oil additive, and can achieve the coexistence of a low dynamic viscosity and a high viscosity index in a higher dimension. <P>SOLUTION: The lubricating base oil includes: (A) 10 to 70 mass% of specified fatty acid polyalkylene alkyl ether having a narrow ratio of 55 to 80%; (B) 5 to 60 mass% of specified fatty acid alkyl ester; and (C) 5 to 60 mass% of fatty acid polyol ester obtained by ester-interexchanging specified fatty acid or fatty acid alkyl ester with specified polyhydric alcohol. <P>COPYRIGHT: (C)2013,JPO&INPIT |
