I live in Canada and I'm trying to source real BMW transmission. My dealer doesn not carry any BMW Lubricants, and cannot find a part number for this oil. They use Maximum 75-90 in the shop but when I'm in hot AZ in the winter I like to use the proper weight oil. I have been using a full synthetic GL-5 Pensoil oil from a local parts supplier, but would like to use the real deal.

Anyone know the BMW part number ?