I am wondering how many of you grease your air filter lip. I do it because I have always been taught to do it. But,it is messy and I don't like to do it. I have heard good things about the pro seal gasket that takes the place of greasing. Do any of you use this?? By looking at the way that the cage and the airbox is designed, it looks as if a properly oiled filter wouldn't leak, even without using grease. As of now, I'm still smearing grease. Tell me what the rest of you do.