Oil compositions derived from transgenic soybeans having a high concentration of oleic acid are described for use in various applications including use to enhance the low temperature pour characteristics of engine fluids. Such oil compositions are useful as lubricants, rail curve grease and engine penetrants.

The present invention aims to provide a viscosity-index improving agent having an excellent friction reduction effect to reduce friction of a lubricating oil composition when the viscosity-index improving agent is added thereto. The present also aims to provide a lubricating oil composition containing the viscosity-index improving agent. The present invention relates to, for example, a viscosity-index improving agent containing: (co)polymer (A) containing, as an essential constituent monomer, a polyolefin-based monomer (a) represented by the following formula (1); an ester oil (B1) having a kinematic viscosity at 100 C. of 1.00 to 2.50 mm.sup.2/s; and an ester oil (B2) having a kinematic viscosity at 100 C. of 2.51 to 5.00 mm.sup.2/s: ##STR00001##
wherein R.sup.1 is a hydrogen atom or a methyl group; X.sup.1 is a group represented by O, O(AO).sub.m-, or NH, A is a C2-C4 alkylene group, m is an integer of 1 to 10, and each A may be the same or different when m is 2 or more; R.sup.2 is a residue after removal of one hydrogen atom from a hydrocarbon polymer containing a 1,2-butylene group as a structural unit; and p represents a number of 0 or 1.

The invention relates to a piston-cylinder unit (100) comprising a cylinder (110) filled with a fluid (150), a piston (120) slidably guided in the cylinder (110), a piston rod (130) attached to the piston (120), a seal (140), and a lubricant in contact with the seal (140) and with the cylinder (110), the piston (120) and/or the piston rod (130). The lubricant is a polyalphaolefin oil or a polyalkylene glycol oil. The seal (140) is made of chlorine-free acrylonitrile butadiene rubber. The invention also relates to a method for producing the piston-cylinder unit (100).

The invention relates to thiophosphates and derivatives thereof useful as antiwear additive components, lubricant additive compositions and lubricant compositions each comprising such compounds, methods for making and using the same, including methods of lubricating machines and machine parts and methods of extending the useful life of elastomeric seal components of such machines.

A lubricating composition and method of making the same are provided. The lubricating composition comprises a lubricant fluid, water, and carbon nanoparticles comprising nanodiamonds. The method comprises mixing the lubricating composition under high shear followed by ultrasonication.

A metafluid includes a fluid exposed to a plurality of loads, each load of the plurality of loads causing a respective pressure change within the fluid. One or more compressible capsules are suspended within the fluid. Each capsule of the one or more compressible capsules has an external shell configured to withstand a cyclic elastic deformation. The external shell changes between a first shape and a second shape when a predetermined load occurs in the plurality of loads.

Lubricant compositions comprising an improved ashless organic friction modifier additive, capable of reducing both friction and wear, is provided. It has been found that mixtures of fatty-alkanolamides containing secondary hydroxyls on the amino alkyl substituent, such as amide mixtures prepared from bis(2-hydroxyporopyl)amine and mixtures of at least two different C.sub.8-24 fatty acids, provide better oil solubility and friction reduction than alkanolamides with primary hydroxyl functionality, such as amide mixtures prepared from di-ethanol)amine.

A lubricant composition comprising (a) from 0.1 to 10 percent by weight of one or more polyalkylene glycols (PAG); and (2) one or more ester base oils selected from the group of natural esters, synthetic esters and combinations thereof; wherein the one or more PAG has a molecular weight in the range 1500 to 5000 g/mole, comprises from 10 to 40 percent by weight of units derived from ethylene oxide and from 90 to 60 percent by weight of units derived from propylene oxide; and wherein the one or more PAGs are in the form of block copolymer, reverse block copolymer or combinations thereof is provided. Also provided is a method of enhancing the hydrolytic stability of an ester base oil.

Compositions comprise first antioxidants and first additives, such as surface, performance-enhancing, lubricant protective, and optionally second and/or second antioxidants. The compositions are useful for improving environmentally acceptable lubricants, lubricant oils, and other lubricant materials. The compositions and methods generally provide longer shelf lives, increased oxidative resistance, improved quality, and/or enhanced performance to lubricants, lubricant oils, hydraulic fluid, and turbine oils.

Provided are formulations, methods of making, and methods of using a functional fluid of the present invention to achieve and maintain optimal frictional characteristics in machines housing that fluid, wherein the functional fluid comprises, among others, a friction-modifying amount of an alkyl toluene sulfonate salt or a mixture of alkyl toluene sulfonate salts.