I just changed the oil in my sons 2000 Saturn SL last night. Seen something I've never seen before. The oil came out very milky looking, kind of freakish! I know this is supposed to be an indicator of water in the oil but it hasn't lost any antifreeze and still runs and sounds like new. Only thing I question is that its been setting out in sub 0 temps for several days before the change. Any ideas?