Abstract: The present invention provides a lubricating oil composition having fuel saving properties and providing gears and bearings with satisfactory durability, which is thus suitably used particularly for a gear system of an automobile. The lubricating oil composition a lubricating base oil comprising a mix base oil of (A) a mineral base oil having a 40° C. kinematic viscosity of 10 mm2/s or higher and 100 mm2/s or lower and (E) a mineral base oil having a 40° C. kinematic viscosity of 200 mm2/s or higher and 600 mm2/s or lower and a sulfur content of 0.3 to 0.9 percent by mass, the content of the base oil belonging to Component (B) is 15 percent by mass or more, and (C) and an organic molybdenum compound in an amount of 100 to 1000 ppm by mass as molybdenum, the lubricating oil composition having a 40° C. kinematic viscosity of 90 mm2/s or lower.

Abstract: A gear oil composition is provided having fuel saving performance and providing gears or bearings with sufficient durability. The composition includes a base oil having a blend of (A) a mineral lubricating base oil having a 100° C. kinematic viscosity of 2 to 6 mm2/s, a % CA of 0.5 or less and a tertiary carbon content of 7% or more and (B) a solvent-refined mineral lubricating oil having a 100° C. kinematic viscosity of 10 to 70 mm2/s in an amount of 2 to 40 percent by mass based on the total base oil composition mass; (D) zinc dialkyldithiophosphate in an amount of 0.02 to 0.5 percent by mass based on the zinc amount; and (E) an alkaline earth metal detergent having a base number of 100 mgKOH/g or greater in an amount of 0.1 to 0.5 percent by mass, based on the metal amount, of the gear oil composition mass.

Abstract: [Problem] To provide a technique for calculating the psychophysical value of a color corresponding to an arbitrarily defined tone by modeling a tone concept defined in the PCCS (Practical Color Co-ordinate System).

Abstract: The lubricating base oil of the invention is characterized by satisfying at least one of the following conditions (a) or (b). (a) A saturated compound content of 95% by mass or greater, and a proportion of 0.1-10% by mass of cyclic saturated compounds among the saturated compounds. (b) The condition represented by the following formula (1). 1.435?n20?0.002×kv100?1.450??(1) wherein n20 represents the refractive index of the lubricating base oil at 20° C., and kv100 represents the kinematic viscosity (mm2/s) of the lubricating base oil at 100° C.

Abstract: The present invention provides a lubricating oil composition for transmissions which is improved in fuel saving properties and has excellent metal fatigue prevention properties and heat resistance. The lubricating oil composition comprises (A) a mineral base oil having a 100° C. kinematic viscosity of 1.5 mm2/s or higher and 3.5 mm2/s or lower, a pour point of ?25° C. or lower, a viscosity index of 110 or greater, a % CN of 2 or greater and 20 or less and a % CA of 3 or less, the lubricating oil composition having a 100° C. kinematic viscosity of 2.5 mm2/s or higher and 3.8 mm2/s or lower.

Abstract: The present invention provides a lubricating oil composition than can keep the metal-to-metal friction coefficient high and is excellent in anti-seizure properties. The lubricating oil composition comprises a base oil and on the basis of the total mass of the composition (A) 0.05 percent by mass or more of a polysulfide, (B) 0.05 percent by mass or more of thiadiazole and (C) 0.1 percent by mass or more of a phosphorus-containing additive, and containing sulfur in an amount of 0.2 percent by mass or more on the basis of sulfur and phosphorus in an amount of 0.2 percent by mass or less on the basis of phosphorus, the ratio of the sulfur basis percent by mass/the phosphorus basis percent by mass (S/P) being from 3.0 to 5.0.

Abstract: A lubricating oil composition is provided having excellent torque capacity, shifting properties, and anti-wear properties for wet friction materials, which can maintain initial torque capacity and shifting properties for a long period of time, suitable for automatic and/or continuously variable transmissions. The lubricating oil composition contains a lubricating base oil and based on the total mass of the composition (A) 0.5 percent by mass or more of a fatty acid amide compound represented by formula (1); (B) 0.05 percent by mass or more of thiadiazole; and (C) 0.1 percent by mass of a phosphorus-containing additive, and contains sulfur in an amount of 0.2 percent by mass or more based on sulfur and phosphorus in an amount of 0.2 percent by mass or less based on phosphorus, the ratio of the sulfur basis percent by mass/the phosphorus basis percent by mass (S/P) being from 3.0 to 5.

Abstract: The present invention provides a lubricating oil composition with excellent torque capacity and shifting characteristics suitable for use as automatic or continuously variable transmission fluids, which composition comprises a base oil and, on the basis of the total mass of the composition, (A) a sulfonate detergent in an amount of 0.01 to 0.3 percent by mass in terms of metal (MeA); (B) a salicylate detergent in an amount of 0 or more than 0 and 0.1 percent by mass or less, in terms of metal (MeB); and (C) a boron-containing succinimide type ashless dispersant in an amount of 0.001 to 0.1 percent by mass in terms of boron (BoC); (MeB)/(MeA) being 0, or greater than 0 and 1.5 or less, and (MeA)/(BoC) being from 0.001 to 20.

Abstract: A gear oil composition is provided having fuel saving performance and providing gears or bearings with sufficient durability. The composition includes a base oil having a blend of (A) a mineral lubricating base oil having a 100° C. kinematic viscosity of 2 to 6 mm2/s, a % CA of 0.5 or less and a tertiary carbon content of 7% or more and (B) a solvent-refined mineral lubricating oil having a 100° C. kinematic viscosity of 10 to 70 mm2/s in an amount of 2 to 40 percent by mass based on the total base oil composition mass; (D) zinc dialkyldithiophosphate in an amount of 0.02 to 0.5 percent by mass based on the zinc amount; and (E) an alkaline earth metal detergent having a base number of 100 mgKOH/g or greater in an amount of 0.1 to 0.5 percent by mass, based on the metal amount, of the gear oil composition mass.

Abstract: The present invention provides a lubricating oil composition that is excellent in anti-fatigue properties for metals and load bearing properties while having improved fuel efficiency. The lubricating oil composition comprises (A) one type or a mixture of two or more types of mineral base oil having a 40° C. kinematic viscosity of from 5 to 15 mm2/s; and (B) one type or a mixture of two or more types of ester-based base oil having a 40° C. kinematic viscosity of from 3 to 25 mm2/s and a 0° C. kinematic viscosity of from 10 to 130 mm2/s, the 40° C. kinematic viscosity of the mixed base oil of (A) and (B) being 18 mm2/s or lower, the blend ratio of the ester-based base oil being from 0.58 to 80 percent by mass, and the 40° C. kinematic viscosity of the composition being from 4 to 23 mm2/s.

Abstract: The present invention provides lubricating oil compositions having excellent anti-wear properties and anti-fatigue properties as well as excellent low temperature fluidity, particularly suitable for automatic transmissions and/or continuously variable transmissions, and internal combustion engines. The compositions comprises (A) a base oil with a kinematic viscosity at 100° C. of 1 to 8 mm2/s, a pour point of ?15° C. or lower, an aniline point of 100° C. or higher, the saturates of the base oil containing 40 percent by mass or more of paraffins, 25 percent by mass or less of one ring naphthenes, and 35 percent by mass or less of two to six ring naphthenes, as the main component, and (B) 0.005 to 0.4 percent by mass of a metallic detergent, (C) 0.005 to 0.2 percent by mass in terms of nitrogen of a succinimide-type ashless dispersant, (D) 0.005 to 0.2 percent by mass in terms of phosphorus of a phosphorus-containing anti-wear agent, and (E) 0.

Abstract: The present invention provides a lubricating oil composition that is excellent in anti-fatigue properties for metals and load bearing properties while having improved fuel efficiency. The lubricating oil composition comprises (A) one type or a mixture of two or more types of mineral base oil having a 40° C. kinematic viscosity of from 5 to 15 mm2/s; and (B) one type or a mixture of two or more types of ester-based base oil having a 40° C. kinematic viscosity of from 3 to 25 mm2/s and a 0° C. kinematic viscosity of from 10 to 130 mm2/s, the 40° C. kinematic viscosity of the mixed base oil of (A) and (B) being 18 mm2/s or lower, the blend ratio of the ester-based base oil being from 0.58 to 80 percent by mass, and the 40° C. kinematic viscosity of the composition being from 4 to 23 mm2/s.

Abstract: The lubricating base oil of the invention is characterized by satisfying at least one of the following conditions (a) or (b). (a) A saturated compound content of 95% by mass or greater, and a proportion of 0.1-10% by mass of cyclic saturated compounds among the saturated compounds. (b) The condition represented by the following formula (1). 1.435?n20?0.002×kv100 ?1.450??(1) wherein n20 represents the refractive index of the lubricating base oil at 20° C., and kv100 represents the kinematic viscosity (mm2/s) of the lubricating base oil at 100° C.

Abstract: The present invention provides a lubricating oil composition with excellent torque capacity and shifting characteristics suitable for use as automatic or continuously variable transmission fluids, which composition comprises a base oil and, on the basis of the total mass of the composition, (A) a sulfonate detergent in an amount of 0.01 to 0.3 percent by mass in terms of metal (MeA); (B) a salicylate detergent in an amount of 0 or more than 0 and 0.1 percent by mass or less, in terms of metal (MeB); and (C) a boron-containing succinimide type ashless dispersant in an amount of 0.001 to 0.1 percent by mass in terms of boron (BoC); (MeB)/(MeA) being 0, or greater than 0 and 1.5 or less, and (MeA)/(BoC) being from 0.001 to 20.

Abstract: The present invention provides a lubricating oil composition which has excellent anti-wear properties for a metal pulley and a metal belt and initial anti-shudder properties and can retain the anti-shudder properties for a long period of time, suitable for use in a continuously variable transmission with a slip-controlled wet clutch and a metal belt. The lubricating oil composition comprises a lubricating base oil, (A) an alkylsalicylic acid metal salt and/or an (overbased) basic salt thereof, wherein the component ratio of the monoalkylsalicylic acid metal salt is from 85 to 100 percent by mole, the component ratio of the dialkylsalicylic acid metal salt is from 0 to 15 percent by mole and the component ratio of the 3-alkylsalicylic acid metal salt is from 40 to 100 percent by mole; (B) a specific nitrogen compound; and (C) a phosphorus-containing anti-wear agent.

Abstract: The present invention provides lubricating oil compositions having excellent anti-wear properties and anti-fatigue properties as well as excellent low temperature fluidity, particularly suitable for automatic transmissions and/or continuously variable transmissions, and internal combustion engines. The compositions comprises (A) a base oil with a kinematic viscosity at 100° C. of 1 to 8 mm2/s, a pour point of ?15° C. or lower, an aniline point of 100° C. or higher, the saturates of the base oil containing 40 percent by mass or more of paraffins, 25 percent by mass or less of one ring naphthenes, and 35 percent by mass or less of two to six ring naphthenes, as the main component, and (B) 0.005 to 0.4 percent by mass of a metallic detergent, (C) 0.005 to 0.2 percent by mass in terms of nitrogen of a succinimide-type ashless dispersant, (D) 0.005 to 0.2 percent by mass in terms of phosphorus of a phosphorus-containing anti-wear agent, and (E) 0.

Abstract: A lubricating oil composition which comprises a lubricant base oil and, incorporated therein, (A) from 0.01 to 0.2 mass % of a polyol compound having from 2 to 20 carbon atoms, (B) from 0.03 to 0.05 mass %, in terms of the amount of boron, of an alkali metal borate, (C) from 0.05 to 0.2 mass %, in terms of the amount of nitrogen, of an ashless dispersant, and (D) from 0.1 to 0.4 mass %, in terms of the amount of an alkaline earth metal, of an alkaline earth metal sulfonate having a total base number of 250 mg-KOH/g or more, the percentages being based on the total amount of the composition. The lubricating oil composition can simultaneously enhance the dynamic and the static friction coefficients in a wet clutch, and is suitable for use particularly in an automatic transmission.

Abstract: Lubricant compositions comprises a lubricant base oil blended with a boron-containing ashless dispersant (A) in an amount of 0.035 or more percent of boron by mass, and an alkaline earth metal sulfonate having a total base number of 50 to 500 mgKOH/g (B) in an amount of 0.01 or more percent of alkaline earth metal by mass, all the percentages being based on the total mass of the composition and if necessary a phosphorus additive. The lubricant compositions are superior in effect to enhance the dynamic- and static-friction coefficients in a wet clutch.