So my roommates 2003 M620 seems to have a little problem. She only has a thousand miles or so on the bike but it seems to be burning oil and spitting some black tar out the back of the exhaust pipes. She took it to the dealer and they told her this was "normal", the oil burning that is. I've never seen anything like this on my '03 M800 in 10,000 miles. I was thinking about taking it to the dealer myself and inisting they don't just blow it off. What does everyone else think?