To buy the right oil you need to know SAE Viscosity Grade and API Quality Index oil for diesel or gasoline engine. You can select any Brand from the listed.
Example: for gasoline engines BMW 6 (G32) 2017, suitable multigrade synthetics oil 10W-40 quality SP, SN+, SN.
For bodies made in 2023, for the cold season, recommended only synthetics 0W-50 \ SP, SN+, SN.
If possible, check the selected oil for compliance with the manufacturers specifications and service intervals.