My daughter bought the Mini in my sig last spring with 30,000 miles. She had a friend that "knows a lot about Minis" do some routine maintenance. I was doing some cosmetic work on it and decided to check a few things. This is what I found when I pulled the air filter. A bunch of crud fell off the lower left before I could take a picture. Although it is packed with oily dirt and bugs, the air box was clean. Go figure.