K&N 99-0621 Air Filter Cleaner - 32oz Trigger Sprayer

This is a lot better value than the size that comes with the regular re-charge kit. The spray bottle offers much better coverage with less waste, and less effort from the regular size finger pump. And I have always found that the cleaner runs out way before the oil of the same size. Also I clean these filters more often, and it really helps with overall milage. Letting a filter go 50k (K&N statement) before you clean it is just CRAZY! Clean it every 10-15k and you will find your car runs better, and you have less gunk on you throttle body that causes poor mileage.