I have read several times on this board that while the M5 burns alot of oil, the dealer supplies oil free of charge as part of the "full maintenance". Well my dealership has a different opinion of this and when I went to top off with a quart after 500 miles they said I needed to pay for it. I put up a fuss and they backed down but I don't want to go through this every time. Does anybody know what the rules are. The book does not specifically address this. Also what oil change intervals in addition to the free ones are you guys using. Obviously these need to be paid for, but that seems to be understood.