[qcj]

I don't drive on dirt roads. So you remove the filter and vacuum it out and put it back in? With a long snout one could almost vacuum the engine filter without taking it out. It is a lot of work removing that thing. Also I understand the glue breaks down after several years and you surely don't want it in the turbo. I don't think I would let it go more than two years before I put in a new one. Just my opinion for what it is worth.