This article is from the VW Technical FAQ, by with numerous contributions by Jan Vandenbrande others.
A: A high quality Lithium based grease with Molibdenum disulfide (MoS2) (all
VW shops have switched to this).
In general you can use "Moly-Slip" grease where you used to use the old
"White Lithium" grease. MoS2 works a bit like graphite in that it doubles
the lubrication properties of the base grease.
Note: Generally do not mix greases of different base, e.g., an Aluminum
based grease with Lithium base. They may react and lose lubrication
properties. Note2: CV Joints use a special grease, less viscous grease.
 
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