| abstract |
A lubricating oil composition, especially a low-phosphorus low-sulfur type lubricating oil composition suitable for use as a lubricating oil for internal combustion engines, which is excellent in oxidative stability, base number retentivity, wearing resistance, extreme-pressure properties, and anticorrosive properties. The lubricating oil composition comprises a lube base oil and, incorporated therein, (A) at least one member selected among metal salts of sulfur-free acid organophosphorus compounds, (B) at least one member selected among phosphorus-containing carboxylic acid compounds and metal salts thereof, and (C) at least one member selected among antioxidants. |