Rein Haldex Clutch Fluid is a high quality formulation of powerful oils with special additives and inhibitors, suitable for use in Audi, VW, Opel, Land Rover, and Volvo Haldex clutch controlled all-wheel drives. Excellent flow ability at low temperatures and cooling capability. Reliable protection against wear, corrosion and foaming. High thermal and oxidative stability with high, stable viscosity index. Haldex oil should be replaced every 20,000 miles and the filter replaced every 40,000 miles.