| abstract |
The present invention relates to lubricating oil compositions for internal combustion engines which comprise: (A) at least about 60% by weight of oil of lubricating viscosity, (B) at least about 2.0% by weight. weight of at least one carboxyl derivative composition produced by reacting B-1 at least one substituted succinic acylating agent with B-2 from about 0.70 equivalent to less than 1 equivalent, per equivalent of agent acylation of at least one amino compound characterized by the presence in its structure of at least one HN <group, and (C) from about 0.01 to about 2% by weight of at least one basic metal salt alkaline sulfonic or carboxylic acid. |