Something I find interesting, Power Commander lists quite a few maps and in many cases states stock or aftermarket air filter on their maps. This tells me the aftermarket filters such as K&N aren't flowing enough air over stock for them to change the map. This means you're basically just getting the advantages of a reusable filter. If this is the case, why get one that requires cleaner and oil when you can get a dry filter you just blow out with air? Just my thoughts.