The high performance flat and conical air filters we offer are reusable
and pre-treated with specifically formulated dirt-trapping oil. The
proprietary lightweight filter oil we use is designed to cause the
cotton filter material to swell, which allows the filter to collect very
small dirt particles (down to 5 microns) that could otherwise hurt the
supercharger and your engine. We recommend that you visually inspect and
clean your air filter, as well as re-oil filter at every engine oil
change interval (at least every 5,000 miles), in order to protect your
supercharger as well as your warranty. Re-oil filter intervals should be
greatly increased if you’re driving in dusty areas.