Disclosed is a lubricating composition having a major amount of an oil of lubrication viscosity and a minor amount of
(A) a nitrogen containing dispersant with a total base number of from 20 to 160 on an oil-free basis wherein the improvement comprises adding to said dispersant; the dispersant comprising a Mannich reaction product and/or a reaction product of a hydrocarbyl-substituted succinic acylating agent with ammonia or an amine;
(B) a sludge preventing/seal protecting additive of at least one aldehyde or epoxide or mixtures thereof.
本发明公开了一种润滑组合物,其主要成分是润滑粘度油,次要成分是
(A) 含氮分散剂,其总碱基数在无油基础上为 20 至 160,其中的改进包括向所述分散剂中添加;该分散剂包括曼尼希反应产物和/或烃基取代的琥珀酰化剂与
氨或胺的反应产物;
(B) 由至少一种醛或
环氧化物或其混合物组成的污泥防止/密封保护添加剂。