paullymano - make sure you do a thorough search on the the oil separator. There is a ton of info on the board including the SIB's to cover all the X5's. For example see here:

http://www.xoutpost.com/bmw-sav-foru...under-cpo.html

shooter - you should at least open it up and have a look at it (clean it out, etc) just to be safe. See this thread:

http://www.xoutpost.com/bmw-sav-foru...-pictures.html