Google "mike miller's old school bmw maintenance schedule". Mike is the technical editor for BMW CCA and is one of the most knowledgeable guys on BMWs. He recommends stock or Redline oils.
Audi R8 V10, 6MT, Ibis White
BMW i3 REx Mega, Laurel Grey
[Retired] BMW Z4 sDrive35i, BMW 335i Coupe