A composition comprising a sheared antifoam solution/mixture with a mean particle size from about 0.01 microns to about 0.5 microns and a maximum particle size of less than about 1 micron. In this composition the sheared antifoam solution/mixture comprises antifoam solution/mixture comprising an antifoam and a base stock.

Provided is a lubricating oil composition comprising: (a) a major amount of an oil of lubricating viscosity, (b) a dispersant polymethacrylate (DPMA) VII; (c) a non-dispersant ethylene-based olefin copolymer viscosity index improver; (d) a molybdenum containing compound; and (e) a minor amount of a salicylate detergent. Also provided is a method of improving friction and reducing wear in an internal combustion engine using said lubricating oil composition

Provided is a lubricating oil composition comprising: (a) a major amount of an oil of lubricating viscosity, (b) a dispersant polymethacrylate (DPMA) VII; (c) a non-dispersant ethylene-based olefin copolymer viscosity index improver; (d) a molybdenum containing compound; and (e) a minor amount of a salicylate detergent. Also provided is a method of improving friction and reducing wear in an internal combustion engine using said lubricating oil composition

Provided is a lubricating oil comprising: (a) a major amount of an oil of lubricating viscosity, (b) a dispersant polymethacrylate (DPMA) VII, (c) a non-dispersant ethylene-based olefin copolymer viscosity index improver, (d) a magnesium containing detergent; wherein the lubricating oil composition is substantially free of molybdenum containing element. Also provided is a method for improving friction and reducing wear in an internal combustion engine using said engine lubricating oil composition.

Provided is a lubricating oil comprising: (a) a major amount of an oil of lubricating viscosity, (b) a dispersant polymethacrylate (DPMA) VII, (c) a non-dispersant ethylene-based olefin copolymer viscosity index improver, (d) a magnesium containing detergent; wherein the lubricating oil composition is substantially free of molybdenum containing element. Also provided is a method for improving friction and reducing wear in an internal combustion engine using said engine lubricating oil composition.

A manual transmission oil composition includes: polyisobutenyl succinimide serving as a detergent-dispersant; and comb polymethacrylate (comb PMA), which has at least one of polar and nonpolar branches connected to a main chain thereof, and serves as a viscosity modifier. Polyisobutenyl succinimide is contained in an amount of 1 wt % to 5 wt % based on a total weight of the manual transmission oil composition, W and comb PMA is contained in an amount of 4 wt % to 12 wt % based on the total weight of the manual transmission oil composition.

Automotive transmission fluid compositions are provided having improved power transmission properties through the presence therein of certain defined additives, which increase the fuel efficiency of the vehicle during operation. The invention further provides a process for the manufacture of such transmission fluid compositions, a method of improving the energy efficiency of a transmission, and an additive concentrate for a transmission fluid.

Automotive transmission fluid compositions are provided having improved power transmission properties through the presence therein of certain defined additives, which increase the fuel efficiency of the vehicle during operation. The invention further provides a process for the manufacture of such transmission fluid compositions, a method of improving the energy efficiency of a transmission, and an additive concentrate for a transmission fluid.

According to the present disclosure, there is provided a high-temperature lubricant composition. The composition has an amount of an ester. The ester exhibits a kinematic viscosity at 100 C. of 1 to 4 centistokes and a kinematic viscosity ratio at 150 C./100 C. of 0.6 or higher. The composition is at a temperature of 100 C. to 150 C. There is also another lubricating composition having the ester and a polymeric viscosity modifier. There are also methods for using the lubricating compositions in the crankcase of an engine.

A lubricating oil composition containing a base oil (A), a comb-shaped polymer (B), and an olefin-based copolymer (C), wherein a content of the component (B) is more than 0.80 mass % based on the total amount of the lubricating oil composition, a weight average molecular weight of the component (C) is 500,000 or more, and the lubricating oil composition has a viscosity index of 200 or more and a kinematic viscosity at 100? C. of 9.3 to 11.0 mm.sup.2/s.