| 摘要 |
A lubricating composition for marine diesel engines comprising (1) 50 to 90 parts by weight of mineral base oil, (2) 50 to 10% parts by weight of a mixture of polymers selected from the group consisting of hydrogenated and non-hydrogenated polybutenes and polyisobutylenes, said mixture comprising a polymer having a Saybolt viscosity at 210 DEG F of between 150 and 3,000 SSU and a polymer having a Saybolt viscosity at 210 DEG F of between 40 and 100 SSU, and (3) a superbasic additive, said lubricating composition having an alkalinity index of between 60 and 70. |
