K&N filter recharge kits provide both cleaner and oil for your KK&N lifetime filter. K&N Air Filter Cleaner is the only cleaner formulated to clean KK&N air filters with cotton media. The use of any other cleaning solution can void the filter's warranty, and quite possibly could damage the cotton material. KK&N Cleaner works to dissolve the dirt build up and old filter oil, and can be washed away with water. It so good at cleaning greasy dirt and grime that it is also used as an industrial strength degreaser.
A K&N Filter is a high-performance aftermarket must.. However, the service interval can vary widely depending on the severity of the driving conditions. The service interval can be from 100 miles in a desert-racing environment to 50,000 miles for normal street use.