I try to consider several factors in the balance of living well and affordable. I must say that the K&N air filter (listed here) and the recharger kit (not included) is an easy, affordable, and effective combination of product that is well worth the buy and the time. All you do to "recharge" is spray the cleaner (in spray bottle) onto both sides of the filter, let sit for ten minutes to break down the grime, let the ~natural flow~ of water (not pressurized by a nozzle) run through the inside (cleaner side) of the air filter to flush the grime out of the other side (repeat if really dirty [doesn't usually need more than once for me and I change it every 6,000-10,000 miles]), and let dry; I shake it out and then stand it up in the (Arizona) sun to make it dry in ten to fifteen minutes. Then, spray the oil (in the aerosol can) evenly onto the outside (the once dirtier side), and let sit for about twenty minutes to allow for the oil to absorb. Check the crowns and grooves on the opposite side to see the places that do now have or need more oil; the filter is whitish and the oil is red in color so you will be able to see where the oil is and how much is there. Repeat until the whole filter is red with oil, wipe the excess oil from the rubber frame, install the clean filter back into your vehicle, start the engine, and listen to that air flow :D.