| abstract |
Lubricating oil composition for internal combustion engines, characterized in that it comprises (A) a major quantity of viscosity oil for lubrication; (B) at least 2.5% by weight of at least one composition based on a carboxylic derivative, which is obtained by the reaction of at least one succinic acylating agent substituted on at least one compound of the amine type which is characterized by the presence, in its structure, of at least one HN> group, in which the substituted succinic acylating agents consist of substituent radicals and of succinic radicals among which the substituent radicals derive from a polyalkene, and (C) from about 0.05 to about 5% by weight of a mixture of metal salts of dihydrocarbyl phosphorodithioic acids. |