[jerkyboy]

So my wife tells me yesterday that she got a low oil indicator on her '11 E93 M3. I figure I'd throw in some regular oil...counter guy at Advance Auto says it calls for Castrol Edge 10W60 at ~$13/qt. Did some research here and it seems as the bearing tolerances are good with that weight oil. My question is, can I use a conventional oil without worrying about damaging the engine? It is my wife's car and she does not drive it hard at all. Also, it only has about 28k miles. Oh, one more thing, how low is the level when the low indicator light comes on?

Thanks in advance for any advice.