Abstract: The invention provides a lubricating grease composition comprising an oil of lubricating viscosity, a metallic soap thickener and a boron-containing compound, wherein the boron containing compound comprises a borate ester comprising at least one alkyl group having a branch at the ? position or higher. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.

Abstract: The invention provides a lubricating grease composition comprising an oil of lubricating viscosity, a metallic soap thickener and a boron-containing compound, wherein the boron containing compound comprises a borate ester comprising at least one alkyl group having a branch at the ? position or higher. The invention further relates to a method of lubricating a mechanical device with the lubricant composition.

Abstract: A lubricating grease composed of a base oil combination comprising 10 to 35% of one or more poly &agr;-olefins, 3 to 15% of one or more synthetic organic esters, 20 to 30% of one or more naphthenic oils, the remainder of the combination being one or more paraffinic oils, the percentages being by weight of the total base oil combination and the ratio of the weight of the ester(s) in the combination to the weight of the poly &agr;-olefin(s) therein being not greater than 1:3; between 2 and 15 % by weight of the total grease of a lithium soap thickener, between 1 and 5% by weight of the total grease of a molybdenum dithiophospbate; between 1 and 5% by weight of the total grease of a zinc dialkyldithiophosphate; between 1 and 5% by weight of the total grease of a sulphur-free friction modifier, and some or all of the normal grease additives such as anti-oxidants, corrosion inhibitors, extreme pressure additives and tackiness agents.