The service interval for a drop-in replacement K&N® High-Flow Air Filter™ can vary greatly depending on the severity of driving conditions—from 100 miles in a desert-racing environment to up to 50,000 miles under normal highway driving conditions. K&N replacement air filters that fit in the factory air box can go up to 50,000 miles before cleaning is required (under normal highway driving conditions), and the larger conical filters included with K&N air intake systems can go up to 100,000 miles before needing to be cleaned (under normal highway driving conditions). Follow this link to view complete cleaning instructions.

K&N® High-Flow Air Filters™ can be cleaned and re-oiled using a K&N Recharger® kit as often as is reasonably necessary. K&N drop-in replacement High-Flow Air Filters™ typically require servicing once every 50,000 miles under normal highway driving conditions, and the larger filters included with K&N intake systems can go up to 100,000 miles before needing to be cleaned (under normal highway driving conditions). Follow this link to view complete cleaning instructions.

Once you determine your K&N® High-Flow Air Filter™ needs to be cleaned, K&N® air filter cleaning products help restore your air filter to like-new condition. K&N oiled filters require Recharger® kits. Follow this link to view complete cleaning instructions and available products.

Once you determine your K&N® DRYFLOW® air filter needs to be cleaned, K&N® air filter cleaning products help restore your air filter to like-new condition. There are specific cleaning kits available for non-oiled K&N filters. Follow this link to view complete cleaning instructions and available products.

Most K&N® cotton air filters come from the factory pre-oiled and ready to install. Certain specialty and racing filters are manufactured as un-oiled filters, and will be clearly indicated as such. Synthetic air filters (such as DRYFLOW® air filters) do not utilize filter oil. Please refer to the Product Specifications on the product details page for your air filter to determine if oil is required, or contact customer service.

When servicing your High-Flow Air Filter™, be sure to follow the re-oiling directions carefully. Use only K&N oil, and never saturate the filter. If oil drips from the filter, allow the filter to sit for several minutes until it stops dripping, and then wipe any excess oil from the filter frame. Follow the oiling instructions included in the Recharger® cleaning kit, and contact customer service if you have questions regarding the oiling process. For the required oil quantity by filter part number, enter the part number in the "Search by Part" box on our Application Search Page, and the factory oil amount will be shown.

Refer to our air filter cleaning and re-oiling procedure for details on how to properly oil your filter once it is clean and dry. For the required oil quantity by filter part number, enter the part number in the "Search by Part" box on our Application Search Page, and the factory oil amount will be shown.

If a tube of sealing grease was included with your air filter, the grease must be used during filter installation to ensure a good seal. Use K&N® sealing grease or lithium-based grease as a substitute. Do not use petroleum-based grease, as it may deteriorate the seal on your air filter.

K&N® does not recommend using other detergents or solvents to clean your air filter, and does not recommend applying any other type of oil. Products other than those manufactured by K&N® have not been tested and may deteriorate the performance and filtering ability of your air filter. Follow this link to view K&N® cleaning product options.

K&N® recommends against using compressed air to dry your air filter, as compressed air may rip and tear the filter fibers. Always allow the filter to dry naturally.

K&N® does not recommend the use of brushes to clean air filters, as the bristles from a brush may rip and degrade the filter media.