It's simple as this, no toil cleaner only works with no toil oil. If you thuroughly clean your twin air with gas or kereosene once, you can use the oil and cleaner and it will work out great. If you do get a new filte, I reccomend the NoToil superflo, it's great. It added some power on my bike and I never went back to a reg air filter. I like NoToil, I've used it from the beggining, and just have been using more of their stuff. As a matter of fact some of us wrote reviews on the other products they sell