you filter the air........
Mine has three chambers......last two are for extracting any oil or water....works great, I've never had an issue. I think I spent 160.00 at Home Depot for mine.......I'm not sure what that transfers to in looney money though...lol
Just a funny story for you all.......A friend of mine and myself decided we wanted to go downhill skiing. We decided to drive to Blue Mountain in Ontario, Canada. On our way there, I got pulled over by a cop.......I'm thinking, their is no way I was speeding (I picked him on my illegal radar detector about two miles earlier) but sure enough, I was getting pulled over. He comes up to the car window and asks me if I've been drinking......which I thought was very odd, considering it was only 8am.....anyways, he admitted that he only pulled me over because he wanted to see my car. I guess Canada doesn't have Mitsubishi.......thought you might find that funny considering chicken and myself were discussing her choices of local home improvement stores...lol