I have looked at the BMW bottles, for a Mfg. or their oil, I can not find an indication of who actually fills the bottle.
Up until a few years ago I used Castrol 20w-50 automobile oil, from the local car parts store. But now that all automobile oils have base ratings of SM or whatever and not the SG/SH base rating, I took Paul G's. advice and am buying Castor 20w-50 4T. It is bottled in Canada, and I buy it at the local Auto Zone store for $4.99+tax/quart. This oil is motorycycle specific and is baseline rated at SG/SH.
Up until a few years ago I used Castrol 20w-50 automobile oil, from the local car parts store. But now that all automobile oils have base ratings of SM or whatever and not the SG/SH base rating, I took Paul G's. advice and am buying Castor 20w-50 4T. It is bottled in Canada, and I buy it at the local Auto Zone store for $4.99+tax/quart. This oil is motorycycle specific and is baseline rated at SG/SH.

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