Originally Posted by Singletrack
He's wrong unless something has changed. Service manual says every other service. I had mine changed at 30k, but they also told me "it didn't have to be done". So I told them that isn't what the manual states and I want to be informed if they weren't going to do it...they ended up doing it. Make sure you call BMWUSA and complain about the fact that dealers don't know how to service one of their marquee cars - so annoying.
He actually showed me a July bulletin that showed every 3rd oil change. Perhaps BMW is cheeping out on the free service.
I did call BMW USA and they deferred me back to the dealer. Useless..
What year is your car? My service booklet says nothing about differential oil.