BMW X3 Service & Repair Manual: Hypoid oils for differential x5/x6 rear axle transverse moment distribution (qmvh transmission)

Standard equipment: Series X6 - E71; X5M - F85; X6M - F86

Optional equipment: Series X5 - E70, F15, F16

NOTE: For capacities for rear axle differential, see Technical data.

General information about final-drive transmission oils

Final-drive and hypoid transmission oil must fulfil the following requirements for handling high loads as arise at the tooth flanks of the hypoid gear:

• high load-carrying capacity
• high degree of immunity from seizure
• good protection against wear
• optimum frictional behavior and temperature stability
• compatibility with sealing materials
• resistance to ageing

A brand-name hypoid transmission oil already possesses these and other characteristics thanks to its high concentration of EP agents (EP = Extreme Pressure).

Oil additives

All final drives are designed in such a way that there is absolutely no need to use oil additives. BMW is totally against the use of such additives. We will also accept no liability for any consequences resulting from the use of additives.