K N air filter oil is the only oil specifically formulated to work in conjunction with K N oiled cotton filters. When used as directed, the oil remains suspended in the pleats of the cotton filter material, allowing for exceptional contaminant capture. Follow the instructions included with your cleaning kit in order to ensure you use the appropriate amount of oil when re-applying. DESIGNED SPECIFICALLY FOR KN AIR FILTERS FORMULATED TO IMPROVE AIR FILTER PERFORMANCE QUICKLY PENETRATES AND SATURATES FILTER PLEATS KN Air Filter Oil traps contaminants that reduce air flow efficiency and disrupt engine performance CLEANS ALL OILED KN AIR FILTERS FILTER OIL KN red filter oil remains suspended in the pleats of the cotton filter material of HighFlow Air Filters, allowing for exceptional contaminant capture RENEWED EFFICIENCY Restores air flow efficiency so your KN air filter performs like new