I've been using mine for about a year and a half and I like it. 9 sounds kind of high, I had mine on 5 and I was getting a lot of sling on my saddlebags and the back of my bike. It's on 3-4 right now and that seems to be just right for me. I'm using the 'blue' oil that came with it. I probably could have switched to 'red' over the summer since it was pretty hot down here but the 'blue' was working out just fine.
