No oil lasts a life time! A local shop can do a scan and drive diagnostic. The service is usually free if the oil is changed or transmission repairs are done as needed. I would call a service shop. I had the oil, filter, and transfer case oil done for $110 locally.
Do you have scanner access to do a deep BMW scan?
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'06 X5 3.0i - bought @143,123 miles (12/26/20)
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