BMW's oil from the parts department is 5W-30. It's what I have currently in my car. I'm moving to Mobil 1 0W-40 on my next oil change. Not sure what is the most preferred oil for our cars, but from the Mafia oil thread (
link), it should be Group IV or Group V oil, and:
"If you decide you want to run an oil not on this list either ask or buy one that meets the following. Our cars like to run oil that has a Viscocity @ 100°C of 11-14 (cSt). I probably wouldn't buy an oil that goes out of this range. Your Winter (W) weight should be 0, 5, or 10. Your upper number should be 30 or 40. If you jump out of these ranges you risk hurting the engine."
Hope that helps. Read through that oil thread, a lot of interesting details.
Perfect, thanks for confirming the DME stuff for me! And I like to go BMW whenever I can, but when it's literally the same part just with the branding scratched off, I have no problem saving some money. Picking Hella was a smart choice, BP.