A mixture of compounds, in which the mixture is a liquid at room temperature, represented by the following formula:

##STR00001##

where R.sup.1 consists of a mixture of at least one unsaturated or branched hydrocarbon chain and at least one saturated or unbranched hydrocarbon chain, R.sup.2 is either a hydrogen atom or a hydrocarbon chain, and m and n are independently from 1 to 5, when used in a lubricating composition, being effective for friction and wear reduction, while providing improved protection against copper and lead corrosion in an engine.

A mixture of compounds, in which the mixture is a liquid at room temperature, represented by the following formula:

##STR00001##

where R.sup.1 consists of a mixture of at least one unsaturated or branched hydrocarbon chain and at least one saturated or unbranched hydrocarbon chain, R.sup.2 is either a hydrogen atom or a hydrocarbon chain, and m and n are independently from 1 to 5, when used in a lubricating composition, being effective for friction and wear reduction, while providing improved protection against copper and lead corrosion in an engine.

A metal working fluid having increased resistance to bacterial growth. The metal working fluid includes a cross-linked polymeric ester emulsifier; and an amine represented by the formula (H.sub.2N).sub.a-Q-(NH.sub.2).sub.b, where a and b are each integers, and Q is at least one carbon atom. Q may also be represented by XYZ, where a+b2; X is a cyclic ring system including 3 to 24 carbon atoms; and Y and Z are groups that include at least one carbon atom directly attached to the cyclic ring system. The metal working fluid may also include a biocide, and may also include an amide that is formed by reacting the amine with a carboxylic acid.

Provided herein is a composition for treating aluminum containing surfaces, wherein the composition includes a reaction product of at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof and at least one fatty acid, wherein the molar ratio of the amino group/s of the at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof and of the at least one fatty acid is 1.2:1 to 1:2, and wherein the at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof is linked to the at least one fatty acid by at least one carboxylic acid/amine salt bond and/or at least one amide bond.

Provided herein is a composition for treating aluminum containing surfaces, wherein the composition includes a reaction product of at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof and at least one fatty acid, wherein the molar ratio of the amino group/s of the at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof and of the at least one fatty acid is 1.2:1 to 1:2, and wherein the at least one amine-functionalized organosilane and/or oligomer and/or polymer thereof is linked to the at least one fatty acid by at least one carboxylic acid/amine salt bond and/or at least one amide bond.

An internal combustion engine lubricating oil composition containing a base oil that is a hydrocarbon oil containing less than 1% by mass of aromatic components and having a sulphur content of less than 20 ppm by mass; a specific organic molybdenum compound as a component (A) at 300 to 1500 ppm by mass as molybdenum atoms; and a borate ester compound as a component (B) at 100 to 1000 ppm by mass as boron atoms.

An internal combustion engine lubricating oil composition containing a base oil that is a hydrocarbon oil containing less than 1% by mass of aromatic components and having a sulphur content of less than 20 ppm by mass; a specific organic molybdenum compound as a component (A) at 300 to 1500 ppm by mass as molybdenum atoms; and a borate ester compound as a component (B) at 100 to 1000 ppm by mass as boron atoms.

Provided are a lubricating oil composition having a high intermetallic friction coefficient and having excellent clutch anti-shudder performance of excellent initial clutch anti-shudder performance and a long clutch anti-shudder lifetime, and a lubrication method and a transmission using the lubricating oil composition. The lubricating oil composition contains an amide compound (A) having a specific structure, a metal-based detergent (B), and at least one phosphorus acid ester (C) selected from an acid phosphate ester and an acid phosphite ester; and the lubrication method and the transmission use the lubricating oil composition.

Provided are a lubricating oil composition having a high intermetallic friction coefficient and having excellent clutch anti-shudder performance of excellent initial clutch anti-shudder performance and a long clutch anti-shudder lifetime, and a lubrication method and a transmission using the lubricating oil composition. The lubricating oil composition contains an amide compound (A) having a specific structure, a metal-based detergent (B), and at least one phosphorus acid ester (C) selected from an acid phosphate ester and an acid phosphite ester; and the lubrication method and the transmission use the lubricating oil composition.

Provided is a lubricating oil composition for use in internal-combustion engines, containing a base oil (A), an ashless dispersant (B) containing a non-boronated alkenylsuccinic acid imide (B1) and a boronated alkenylsuccinic acid imide (B2), a thiadiazole compound (C), and an aromatic carboxylate (D) having one or more hydroxy groups, wherein the content of the component (C) is 0.2 to 1.2% by mass based on the total amount of the lubricating oil composition, the content of a zinc dithiophosphate is, as calculated in terms of zinc atoms, less than 500 ppm by mass based on the total amount of the lubricating oil composition, and the content of a metal-based detergent is, as calculated in terms of metal atoms, less than 600 ppm by mass based on the total amount of the lubricating oil composition.