BMW X5 - Manual (Page 226)

Diesel engine
BMW Longlife-04.
Additional information about the approved
types of oils can be requested from the service
center.
Alternative oil types
If the approved engine oils are not available, up
to 1 US quart/liter of an oil with the following
specification can be added:
Gasoline engine
API SM or superior grade specification.
Diesel engine
API ILSAC GF-5.
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Mobility Engine oil
226
Online Edition for Part no. 01 40 2 926 740 - X/13
Engine oil change
The manufacturer of your vehicle recommends
having the engine oil changed by your service
center.