Last weekend I did my first oil change on my relatively new to me 2000LT. I changed the oil at the 6000 mile interval. When I was determining the oil level I discovered that my oil window was so dark that I could not see the level until I used a strong flashlight and put the bike on the side stand. My question is will the BMW 15-50 oil have enough detergent in it to clean up the sight glass? If not, what are my options?