Das steht dazu in der BA des E65. Also würde ich mir keine Sorgen machen
Approved engine oils
The quality of the engine oil is a decisive
factor for the correct operation and long life
of your car's engine. BMW has conducted
extensive tests before approving certain
grades of engine oil.
BMW Service can provide details of
the oils approved by BMW for your
car.<
Alternative oil grades
If you are unable to purchase one of these
oils, as an exception you can top up the oil
level in between oil changes with other
grades of oil. The oil specification on the
container must be one of the following:
> Preferred: BMW Longlife-01 FE,
BMW Longlife-01
> Alternatively: BMW Longlife-98,
BMW Longlife or ACEA A3.
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