Abstract: A composition is disclosed that comprises lubricating oil and at least a first antioxidant and a second antioxidant, the first antioxidant being a secondary diarylamine and the second antioxidant being a 2,2,4-trialkyl-1,2-dihydroquinoline or a polymer thereof. Also disclosed is a method of increasing the oxidation stability of a lubricating oil comprising adding thereto at least a first antioxidant and a second antioxidant, the first antioxidant being a secondary diarylamine and the second antioxidant being a 2,2,4-trialkyl-1,2-dihydroquinoline or a polymer thereof.

Abstract: Disclosed herein is a composition comprising: (A) a lubricant, and (B) at least one imidazole thione compound of the formula: wherein R1, R2, R3, and R4 are independently selected from the group consisting of alkyl, functionalized alkyl, and hydrogen.

Abstract: A lubricating oil additive is disclosed that comprises the reaction product of:(a) an unsaturated or saturated ester or acid,(b) a diamine of the formula: ##STR1## (c) carbon disulfide, and (d) a molybdenum compound,wherein R.sub.8 is an alkyl group of 1 to 40 carbon atoms, R.sub.9 and R.sub.10 are independently selected aliphatic or aromatic moieties, W is oxygen, sulfur, or --CH.sub.2 --. The additive imparts friction modification and beneficial antiwear, extreme pressure, and oxidation stability properties to the lubricating oil.

Abstract: Disclosed herein is a composition comprising:(A) a lubricant, and(B) at least one cyclic thiourea selected from the group consisting of: ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from the group consisting of alkyl, functionalized alkyl, and hydrogen.

Abstract: Dithiocarbamyl carboxylic acids, useful as multifunctional additives for lubricating oils, possess the general formula: ##STR1## wherein R.sup.1 and R.sup.2 each independently is a hydrocarbyl group of from 1 to about 60 carbon atoms and R.sup.3 is a divalent alkylene group of from 1 to about 20 carbon atoms.

Abstract: Dithiocarbamyl carboxylic acids, useful as multifunctional additives for lubricating oils, possess the general formula: ##STR1## wherein R.sup.1 and R.sup.2 each independently is a hydrocarbyl group of from 1 to about 60 carbon atoms and R.sup.3 is a divalent alkylene group of from 1 to about 20 carbon atoms.

Abstract: A composition of matter having the structure ##STR1## wherein R.sup.1, R.sup.2, R.sup.4, and R.sup.5 are independently a member selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl, and alkaryl, and R.sup.3 is alkylene. Lubricants and lubricant additives comprising the composition are also disclosed. The lubricants are preferably lubricating oils.

Abstract: A graft copolymer is disclosed. The copolymer is prepared by the interpolymerization of a mixture of monomers comprising ethylene, a C.sub.3 to C.sub.12 alpha monoolefin, and a polyene being a member selected from the group consisting of non-conjugated dienes and trienes. Grafted to the copolymer is a 2-mercapto-1,3,4-thiadiazole moiety. Lubricating oil additives and lubricating oils comprising the graft copolymer are also disclosed.

Abstract: A composition of matter is disclosed having the structure: ##STR1## wherein R and R.sup.1 are independently a member selected from the group consisting of alkyl, cycloalkyl, aryl, aralkyl, and alkaryl; R.sup.2 is an alkylene moiety; R.sup.3 is hydrogen, alkyl, alkenyl, aryl, alkaryl, aralkyl, or 2-hydroxyalkyl; X is sulfur; and y is 0 or 1. Lubricants and lubricant additives comprising the composition are also disclosed. The lubricants are preferably lubricating oils.

Abstract: A lubricating oil composition comprising:(a) a major amount of an oil of lubricating viscosity; and(b) a minor amount of a synergistic combination of an antioxidant-dispersant additive and a dispersant additive, said combination comprising:(i) a polyisobutylene succinimide;(ii) an ethylene-propylene succinimide; and(iii) an akylated phenothiazine represented by the formula ##STR1## wherein R.sup.1 is a linear or branched (C.sub.4 -C.sub.24) alkyl, heteronlykl or alkylary group; and R.sup.2 is H or a linear or branched (C.sub.4 -C.sub.24) alkyl group.

Abstract: A diesel fuel composition which is comprised of:(a) a major portion of a low-sulfur content diesel fuel; and(b) a minor amount, as an anti-wear lubricity additive, of a dithiophosphoric diester-dialcohol.

Abstract: An additive compositon comprising a graft and aminederivatized copolymer prepared from ethylene and at least one (C.sub.3 -C.sub.10) alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said (C.sub.3 -C.sub.10) alpha-monoolefin and from about 0 to 15 mole percent of said polyene, said copolymer having a number average molecular weight ranging from about 5,500 to 50,000 and having grafted thereon at least 1.8 molecules of a carboxylic acid acylating function per molecule of said copolymer and reacting said grafted copolymer with an amino alcohol compound selected from the group consisting of a 2-Anilinoalcohol, a (2-hydroxyalkyl)pyrridine, a 4-(2-hydroxyalkyl) morpholine, a 1-(2-hydroxyalkyl)piperazine, a 1-(2-pyrrolidine and a 1-(2-hydroxyalkyl) 2-pyrrolidine.

Abstract: A lubricating oil composition comprising a major portion of a lubricating oil and a minor amount of an additive. The additive is prepared by reacting a polyamine with an alkenyl succinic acid anhydride having a number average molecular weight of about 500 to about 10,000 at a temperature of 60.degree. C.-120.degree. C. to form mono-alkenyl succinimide, bis-alkenyl succinimide or a mixture of mono- and bis-alkenyl succinimide. 2-pyrrolidone-5-carboxylic acid is then added to form an acylated mono-alkenyl succinimide, bis-alkenyl succinimide or mixture of mono- and bis-alkenyl succinimide. The acylated mono-alkenyl succinimide, bis-alkenyl succinimide or mixture of mono- and bis-alkenyl succinimide is acylated with an acylating compound selected from the group consisting of glycolic acid, oxalic acid, lactic acid, 2-hydroxymethyl-propionic acid and 2,2-bis(hydroxymethyl) propionic acid at a temperature of about 150.degree. C. to about 185.degree. C.

Abstract: An additive composition comprising a graft and derivatized copolymer prepared from ethylene and at least one C.sub.3 -C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 -C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene having an average molecular weight ranging from about 5,500 to 500,000, which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with a N-(2-aminoalkyl)imidizolidone to form said graft derivatized copolymer, and a lubricating oil composition containing same are provided.

Abstract: An additive composition comprising a graft and amine-derivatized copolymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 to C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene, the copolymer having a number average molecular weight ranging from about 5,500 to about 50,000 and having grafted thereon at least 1.8 molecules of a carboxylic acid acylating function per molecule of the copolymer and reacting the grafted copolymer with an amine substituted phenothiazine to form the grafted and amine-derivatized copolymer, and a lubricating oil composition containing same are provided.

Abstract: A lubricating oil composition having improved dispersancy. The dispersant being prepared by coupling two mono- and/or bis-alkenyl succinimides with an aldehyde and thioalkylphenol. The resulting coupled succinimide is then an acylated with an acylating agent to form an acylated Mannich thioalkylphenol coupled mono and/or bis-alkenyl succinimide.

Abstract: A lubricating oil composition having improved dispersancy and antioxidancy. The dispersant being prepared by coupling mono- and/or bis-alkenyl succinimides with an aldehyde and hydroxyaromatic amine. The resulting coupled succinimide is then acylated with an acylating agent to form a Mannich hydroxyaromatic amine coupled acylated mono and/or bis-alkenyl succinimide.

Abstract: An additive composition comprising a graft and amine-derivatized copolymer prepared from ethylene and at least one C.sub.3 to C.sub.10 alpha-monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C.sub.3 to C.sub.10 alpha-monoolefin and from about 0 to 15 mole percent of said polyene, said copolymer having a number average molecular weight ranging from about 5,500 to 50,000 and having grafted thereon at least 1.8 molecules of a carboxylic acid acylating function per molecule of said copolymer and reacting said grafted copolymer with an amino-aromatic polyamine compound from the group consisting of an N-arylphenylenediamine, an aminocarbazole, an aminoindole, an amino-indazolinone, an aminomercaptotriazole, and an amino-perimidine to form said graft and amine-derivatized copolymer, and a lubricating oil composition containing same are provided.

Abstract: A polymeric lubricating oil additive containing pendant perfluoroaliphatic ester groups that behave as a fuel economy enhancer when added to lubricating oil compositions. The additive is prepared by the process which comprises reacting a perfluoroaliphatic alcohol with an alkenyl succinic acid anhydride to form a alakenyl succinic mono and/or diester in the presence of an acid catalyst.

Abstract: A graft copolymer is disclosed. The copolymer is prepared by the interpolymerization of a mixture of monomers comprising ethylene, a C3 to C12 alpha monoolefin, and a polyene being a member selected from the group consisting of non-conjugated dienes and trienes. Grafted to the copolymer is a 2-mercapto-1,3,4-thiadiazole moiety. Lubricating oil additives and lubricating oils comprising the graft copolymer are also disclosed.