I bought my Cruiser last fall. Before I baselined it by changing all the fluids I noticed it had a very slight leak by the spot on my garage floor. When I baselined it I went with synthetic oil. The leak got substantially worse. At my last oil change I decided to try Quaker State High Mileage oil. The stuff must work, at least for me. I completely washed out the garage when I got the oil changed (over 2 weeks ago) and the spot has not returned. I didn't expect it to happen, but it did for me anyway.