Lubricating composition containing emulsion-sludge inhibitors

摘要

A lubricating oil composition for use in the crankcase of an internal combustion engine, having improved resistance to the formation of emulsion-sludge in the area under the engine rocker cover, which contains the combination of an oxyalkylated alkylphenol-formaldehyde condensation product and tetra polyoxyethylene polyoxypropylene derivative of ethylene diamine.