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 is a non-emulsifying, chlorine-free metal working or cutting oil which exhibits the same or superior performance as heretofore exhibited by chlorine containing fluids. The metal working oil contains cosulfurized olefins, polysulfurized hydrocarbon, phosphate esters, animal triglycerides, high molecular weight polyolefins in a mineral oil basestock. The oil may also contain metal deactivators, antioxidants and preservatives such as BHT, and mixtures of the above.