Abstract: Provided is a lubricating oil composition and methods for controlling one or more of foam tendency and foam stability in such composition using as the oil a mixture of at least two base stocks. The at least two base stocks have a surface tension difference between them such that, when the surface tension difference is greater than 1.0 dynes/cm, then one or more of foam tendency and foam stability are enhanced as compared to foam tendency and foam stability achieved using the base stocks separately and not in the mixture. When the surface tension difference between them is less than 1.0 dynes/cm, then one or more of foam tendency and foam stability are reduced or equivalent as compared to foam tendency and foam stability achieved using the base stocks separately and not in the mixture. Two low-foaming base stocks can produce a significant high foam response that reduces or eliminates the need for pro-foaming additives.

Abstract: This disclosure relates to a low viscosity lubricating turbine oil having a composition comprising a lubricating oil base stock, as a major component, and one or more lubricating oil additives, as minor components. The lubricating turbine oil has a kinematic viscosity of about 16 cSt to about 22 cSt at 40° C., a density of about 0.8 g/ml to about 0.9 g/ml, and an absolute evaporation loss at 150° C. of less than about 4%. This disclosure also relates to a method for improving energy efficiency in a turbomachine lubricated with the low viscosity lubricating turbine oil. This disclosure further relates to a method for improving energy efficiency while maintaining or improving deposit control and lubricating oil additive solvency in a turbomachine lubricated with the low viscosity lubricating turbine oil. This disclosure yet further relates to a method for improving solubility, compatibility and dispersancy of polar additives in the low viscosity lubricating turbine oil.

Abstract: A method for improving filterability, while maintaining or improving antifoaming performance, of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using as the lubricating oil a formulated oil. A method for improving antifoaming performance, while maintaining or improving filterability, of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and at least one antifoam agent, as a minor component. A lubricating oil having a composition including a lubricating oil base stock as a major component, and at least one antifoam agent, as a minor component. The antifoam agent is a silicone composition having a highly branched functionalized silicone backbone. The lubricating oils are useful as automotive gear lubricating compositions.

Abstract: A method for improving filterability, while maintaining or improving antifoaming performance, of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using as the lubricating oil a formulated oil. A method for improving antifoaming performance, while maintaining or improving filterability, of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition including a lubricating oil base stock as a major component, and at least one antifoam agent, as a minor component. A lubricating oil having a composition including a lubricating oil base stock as a major component, and at least one antifoam agent, as a minor component. The antifoam agent is a silicone composition having a highly branched functionalized silicone backbone. The lubricating oils are useful as automotive gear lubricating compositions.

Abstract: This disclosure relates to a low viscosity lubricating turbine oil having a composition comprising a lubricating oil base stock, as a major component, and one or more lubricating oil additives, as minor components. The lubricating turbine oil has a kinematic viscosity of about 16 cSt to about 22 cSt at 40° C., a density of about 0.8 g/ml to about 0.9 g/ml, and an absolute evaporation loss at 150° C. of less than about 4%. This disclosure also relates to a method for improving energy efficiency in a turbomachine lubricated with the low viscosity lubricating turbine oil. This disclosure further relates to a method for improving energy efficiency while maintaining or improving deposit control and lubricating oil additive solvency in a turbomachine lubricated with the low viscosity lubricating turbine oil. This disclosure yet further relates to a method for improving solubility, compatibility and dispersancy of polar additives in the low viscosity lubricating turbine oil.

Abstract: The present invention relates to methods of lubricating a hydraulic motor by using a lubricating composition that contains a friction modifier selected from the group consisting of a fatty phosphite, a fatty imidazoline and combinations thereof and supplies improved motor efficiency performance. The invention further provides the lubricating compositions used therein.

Abstract: Disclosed are compositions of a major amount of alkylated aromatics compounds, in particular alkylated naphthalene and alkylated benzene, optionally combined with API Group II, Group III, Group IV and/or ethylene copolymers, showing improved thermo-oxidation performance when containing an additive combination including an alkylated or non-alkylated diarylamine and a sulfur-containing metal passivator. Particularly, the lubricating compositions include at least 55 wt % of a base oil selected from the group consisting of alkylated naphthalene, alkylated benzene and combinations thereof, and from 0 wt % to 45 wt % of another base oil component. The ratio of amine component to sulfur component in the additive combination is from 1:1 to 20:1. The compositions contain an amount of base oil other than alkylated naphthalene, alkylated benzene and API Group II, Group III, Group IV and/or ethylene copolymers of less than 10 wt % based on the total weight of the components comprising the lubricating composition.

Abstract: A method for improving varnish control in a mechanical device requiring hydraulic fluids, turbine oils, industrial fluids, circulating oils, or combinations thereof. The method involves supplying the mechanical device with a lubricating composition including a Group III lubricating oil base stock. The Group III lubricating oil base stock has a viscosity from 3.8 to 8.5 mm2/s at 100° C., a viscosity index greater than 120, a sulfur content less than 0.0003 weight percent, and an aromatic hydrocarbon content less than 0.2 weight percent, based on the total weight of the Group III lubricating oil base stock. Varnish reduction properties are improved as compared to varnish reduction properties achieved using a lubricating composition containing a different Group III lubricating oil base stock. The disclosure also provides lubricating compositions used in the method.

Abstract: The present invention relates to methods of lubricating a hydraulic motor by using a lubricating composition that contains a friction modifier selected from the group consisting of a fatty phosphite, a fatty imidazoline and combinations thereof and supplies improved motor efficiency performance. The invention further provides the lubricating compositions used therein.

Abstract: A novel lubricant composition is disclosed. In one embodiment the lubricant composition comprises in admixture: a first base stock component comprising one or more base stocks each having a viscosity of at least 40 cSt, Kv100° C. and a molecular weight distribution (MWD) as a function of viscosity at least 10 percent less than algorithm: MWD=0.2223+1.0232*log (Kv at 100° C. in cSt); and a second base stock component comprising at least one Poly-Alpha-Olefin (PAO) base stock and at least one Group III base stock, each having a viscosity less than 10 cSt, Kv100° C.

Abstract: A lubricant composition including a first fluid having a viscosity from 150 cSt to 2000 cSt at 40° C. (ASTM D-445) and a traction coefficient from 0.01 to 0.025 (MTM TC Method), and a second fluid having a viscosity from 1 cSt to 30 cSt at 40° C. (ASTM D-445) and a traction coefficient from 0.008 to 0.015 (MTM TC Method). The second fluid is miscible with the first fluid. The traction coefficient of the lubricant composition is lower than the traction coefficient of the first fluid and the traction coefficient of second fluid, as determined by the MTM TC Method. Provided is also a method of reducing the traction coefficient of a lubricant composition.

Abstract: A novel lubricant composition is disclosed. In one embodiment the lubricant composition comprises in admixture: a first base stock component comprising one or more base stocks each having a viscosity of at least 40 cSt, Kv100° C. and a molecular weight distribution (MWD) as a function of viscosity at least 10 percent less than algorithm: MWD=0.2223+1.0232*log (Kv at 100° C. in cSt); and a second base stock component comprising one or more base stocks each having a viscosity less than 10 cSt, Kv100° C.

Abstract: In one embodiment a novel lubricant is disclosed. The lubricant comprises an alkylated naphthalene base stock with a viscosity of at least 2 cSt and less than 22 cSt kv100° C., the alkylated naphthalene base stock is greater than 55 weight percent of the lubricant, a PAO base stock with at least 4 cSt and less than 250 cSt kv100° C., the PAO base stock is at least 2 and less than 40 weight percent of the lubricant, at least 0.5 and less than 1.5 weight percent of the lubricant is an amine antioxidant additive, at least 0.5 and less than 1.5 weight percent of the lubricant is a defoamant additive, at least 0.1 and less than 0.4 weight percent of the lubricant is an alkylated rust inhibitor additive, and the lubricant has a viscosity of at least 4 cSt and less than 10 cSt kv100° C., less than 10 ppm metals, less than 100 ppm sulfur, and a VI greater than 70.

Abstract: This invention is directed to a lubricant composition that is comprised of a continuous phase and a discontinuous phase, i.e., a two phase lubricant composition. The continuous phase and the discontinuous phase of the lubricant of this invention are oil or oil type compositions that are essentially insoluble in one another. The lubricant composition is comprised of a continuous phase base oil that is comprised of a low viscosity Group II, III, IV or GTL base stock or a blend of at least two of the Group II, III, IV and GTL base stocks, optionally including a low viscosity Group V base stock, with the continuous phase base oil having, independently, a viscosity of from 1 to 100 cSt at 100° C. The lubricant composition is further comprised of a discontinuous phase that is comprised of an ester composition having a mean average droplet size of from 0.01 microns to 20 microns, in which the ester composition is comprised of an ester compound having no ether linkages.

Abstract: A Group IV/Group V lubricating composition providing improved antioxidation performance comprises from 5 wt. % to 40 wt. % of a Group V base oil component, such as alkylated naphthalene, at least 30 wt. % of a Group IV base oil component, such as one or more polyalphaolefin base stocks, and from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound. The trithiophosphate-containing compound is preferably C30H57O7PS3. The lubricating composition includes not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, and, preferably not greater than 10 ppm heavy metal component. The lubricating composition preferably has a kinematic viscosity of from 20 cSt to 1,000 cSt at 40° C. and a viscosity index (VI) of from 130 to 200.

Abstract: Disclosed are compositions of a major amount of alkylated aromatics compounds, in particular alkylated naphthalene and alkylated benzene, optionally combined with API Group II, Group III, Group IV and/or ethylene copolymers, showing improved thermo-oxidation performance when containing an additive combination including an alkylated or non-alkylated diarylamine and a sulfur-containing metal passivator. Particularly, the lubricating compositions include at least 55 wt % of a base oil selected from the group consisting of alkylated naphthalene, alkylated benzene and combinations thereof, and from 0 wt % to 45 wt % of another base oil component. The ratio of amine component to sulfur component in the additive combination is from 1:1 to 20:1. The compositions contain an amount of base oil other than alkylated naphthalene, alkylated benzene and API Group II, Group III, Group IV and/or ethylene copolymers of less than 10 wt % based on the total weight of the components comprising the lubricating composition.

Abstract: A lubricant formulation and method of blending a lubricant formulation is disclosed. The lubricant formulation comprises at least two base stocks. The first base stock comprises a viscosity greater than 40 cSt, Kv100° C. and a tight molecular weight distribution as a function of viscosity. The second base stock comprises a viscosity less than 10 cSt, Kv100° C. The lubricant formulation provides favorable properties.

Abstract: A lubricant formulation and method of blending a lubricant formulation is disclosed. The lubricant formulation comprises at least two base stocks. The first base stock comprises a viscosity greater than 135 cSt, Kv100° C. and a tight molecular weight distribution as a function of viscosity. The second base stock comprises a viscosity less than 60 cSt, Kv100° C. The formulation also comprises a polyol ester. The lubricant formulation provides favorable properties.

Abstract: An additive package, lubricant formulation with the additive package and method of improving gear lubricant properties with the additive package are disclosed. The additive package comprises at least one antiwear additive, at least one antioxidant additive, at least one rust inhibitor additive, at least one metal passivator additive, at least one demulsifier additive, at least one defoamant additive wherein the composition has less than 3.5% phosphorous, less than 1.7% ppm nitrogen, less than 1000 ppm sulfur, less than 100 ppm metals and a TAN of less than 1.

Abstract: A Group IV/Group V lubricating composition providing improved antioxidation performance comprises from 5 wt. % to 40 wt. % of a Group V base oil component, such as alkylated naphthalene, at least 30 wt. % of a Group IV base oil component, such as one or more polyalphaolefin base stocks, and from 0.25 wt. % to 1.5 wt. % of a trithiophosphate-containing compound. The trithiophosphate-containing compound is preferably C30H57O7PS3. The lubricating composition includes not greater than 5 wt. % of a Group I, Group II, or Group III base oil component, and, preferably not greater than 10 ppm heavy metal component. The lubricating composition preferably has a kinematic viscosity of from 20 cSt to 1,000 cSt at 40° C. and a viscosity index (VI) of from 130 to 200.