ULTRA-LOW SAPS LUBRICANTS FOR INTERNAL COMBUSTION ENGINES

摘要

Disclosed is an ultra-low SAPS lubricating oil composition comprising: an oil of lubricating viscosity; an aromatic dicarboxylic acid treated dispersant supplying at least 0. 30 wt% of the aromatic dicarboxylic acid to said lubricating oil composition; an ashless peroxide decomposer present at a treat rate of from about 0.4 to 5.0 wt%; a metal deactivator wherein the metal deactivator is present at a treat rate of greater than 0.08 wt%; wherein said lubricating oil composition contains less than 1000 ppm sulfur, less than 300 ppm phosphorus and less than 0.25 wt% sulfated ash.