| 摘要 |
<p>A lubricating oil composition having excellent oxidation stability and reduced sludge formation which comprises (I) a base oil which is a mineral oil having an aromatic content of up to 30 wt.%, a synthetic oil having no aromatic rings in the structural units or a mixture thereof, and, as essential additives, (II) an N-p-alkylphenyl-alpha-naphthylamine and (III) a p,p min -dialkyldiphenylamine each in a specific minor amount.</p> |
