Lubricating oil compositions and concentrates

A lubricating oil composition for internal combustion engines which comprises

• (A) a major amount of oil of lubricating viscosity,
• (B) from about 0.5% to about 10% by weight of at least one carboxylic derivative composition produced by reacting
• (B-1) at least one substituted succinic acylating agent with
• (B-2) from about 0.70 equivalent to about 0.95 equivalent, per equivalent of acylating agent, of at least one amine characterized by the presence within its structure of at least one HN<
• group wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 2 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups,
• (C) from about 0.05 to about 5% by weight of at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
• (C-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least 10 mole percent of isopropyl alcohol and at least one primary aliphatic alcohol containing from about 3 to about 13 carbon atoms, and
• (C-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper,
• (D) 0.1 to about 10% of at least one carboxylic ester derivative composition produced by reacting
• (D-1) at least one substituted succinic acylating agent with
• (D-2) at least one alcohol of the general formula
• R.sub.3 (OH).sub.m (X)
• wherein R.sup.3 is a monovalent or polyvalent organic group joined to the --OH groups through carbon bonds, and m is an integer of from 2 to about 10, and
• (E) from about 0.01 to about 5% by weight of at least one alkaline earth metal salt of an organic acid compound selected from the group consisting of sulfur acids, carboxylic acids, phosphorus acids, phenols, and mixtures of said acids.

A lubricating oil composition for internal combustion engines which comprises

• (A) a major amount of oil of lubricating viscosity,
• (B) from about 2% to about 10% by weight of at least one carboxylic derivative composition produced by reacting
• (B-1) at least one substituted succinic acylating agent with
• (B-2) from about 0.75 equivalent to about 0.90 equivalent, per equivalent of acylating agent, of at least one polyamine characterized by the presence within its structure of at least one HN<
• group wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 2 to about 4, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups,
• (C) from about 0.05 to about 5% by weight of at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
• (C-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least about 20 mole percent of isopropyl alcohol and at least one primary aliphatic alcohol containing from about 6 to about 13 carbon atoms, and
• (C-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper,
• (D) 0.1 to about 10% of at least one carboxylic ester derivative composition produced by reacting
• (D-1) at least one substituted succinic acylating agent with
• (D-2) from about 0.1 to about 2 moles, per mole of acylating agent of at least one polyhydroxy compound selected from the group consisting of neopentyl glycol, ethylene glycol glycerol, pentaerythritol, sorbitol, mono-alkyl or mono-aryl ethers of a poly(oxyalkylene)glycol or mixtures of any two or more of these, and
• (E) from about 0.01 to about 5% by weight of at least one alkaline earth metal salt of an organic acid compound selected from the group consisting of sulfonic acids, carboxylic acids, phenols, and mixtures of said acids.

A concentrate for formulating lubricating oil compositions comprising from about 20 to about 90% by weight of a normally liquid, substantially inert organic diluent/solvent,

• (B) from about 10 to about 50% by weight of at least one carboxylic derivative composition produced by reacting
• (B-1) at least one substituted succinic acylating agent with
• (B-2) less than one equivalent, per equivalent of acylating agent, of at least one amine characterized by the presence within its structure of at least one HN<
• group wherein said substituted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 1.5 to about 4.5, said acylating agents being characterized by the presence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substituent groups, and
• (C) from about 0.001 to about 15% by weight of at least one metal salt of a dihydrocarbyl dithiophosphoric acid wherein
• (C-1) the dithiophosphoric acid is prepared by reacting phosphorus pentasulfide with an alcohol mixture comprising at least 10 mole percent of isopropyl alcohol and at least one primary aliphatic alcohol containing from about 3 to about 13 carbon atoms, and
• (C-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper.