Lubricant compositions

A non-homogeneous lubricant composition comprising (A) a non-silicone lubricant base stock and (B) a polysiloxane selected from polydialkylsiloxane, polyalkylphenylsiloxane, polyalkylarylsiloxane, polytrifluoropropylmethyl siloxanes wherein component B is present in the range of 1-70% weight of the total of (A) +(B) and B has a viscosity of at least 5mPa.s at 40°C. The composition is intended for use as or in an automatic transmission fluid, a manual transmission fluid, an axle lubricant, a transaxle lubricant, an industrial gear lubricant, a circulating lubricant, an open gear lubricant, an enclosed gear lubricant, an hydraulic fluid, a compressor fluid, a gear oil for wind turbines or a grease.