| abstract |
The present invention relates to the field of multifunctional lubricants that can be used in the various parts of motor vehicles, notably in the engine, the transmission or the hydraulic circuit. The invention relates to the use of at least one viscosity index improver polymer chosen from hydrogenated diene/vinyl aromatic copolymers in a lubricant composition for reducing the viscosity of said lubricant composition in the course of the use of said lubricant composition during the lubrication of the various parts of an industrial vehicle, notably an industrial vehicle with a diesel engine, such as the engine, the gearbox and the hydraulic circuit, said lubricant composition undergoing at least one thermal shearing during the use thereof. |