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Originally Posted by brian5
I actually had to look up this info, in my Owner's Manual, for my E70 this weekend. Oil was at minimum level. It was very difficult to find the exact oil that BMW specified at my nearest Napa Parts store. But I guess some of you know EXACTLY what oil BMW specifies... 
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Brian,
We are all getting ready for the dreaded "OIL THREAD". No need to get your panties in a wad.
Oil is like bottled water. The bottles of water all do the same thing, keep you hydrated. Some have flavors, some are from springs, some are just filtered city water. Some people have a favorite one they swear by and all the others are not fit to use for flushing a toilet.
My point being,
any synthetic oil in the proper weight range will do no harm to your engine. In fact any of the top brands of non-synthetic oils in the correct weight range will do no harm either.
As for topping off the oil level. It
really doesn't matter what you use as long as it is in the correct weight range.
The two most important aspects of oil are, change at the specified intervals, and keep enough of it in the engine.
That's all