How often should I re-oil my K&N air filter?

The frequency depends on your driving conditions. In dusty environments, you'll need to clean and re-oil your filter more often than in normal conditions. A good rule of thumb is to inspect your filter every 25,000 to 50,000 miles and clean/re-oil as needed.

Can I use other types of oil on my K&N air filter?

No, K&N air filter oil is specially formulated to work with the cotton fabric in K&N air filter elements. Using other oils can damage the filter and reduce its effectiveness.

How do I know when my K&N air filter needs to be re-oiled?

Visually inspect the filter. If the filter appears dry or the color is fading, it's time to re-oil. Also, if you notice a decrease in engine performance or fuel economy, it may be time to clean and re-oil your filter.

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Specifications

Brand: K&N
Part #: 99-0555
UPC: 024844044952

K&N 5 Gallon Air Filter Oil

Name: K&N 5 Gallon Air Filter Oil
Brand: K&N
SKU: k-n-engineering-k-n-5-gallon-air-filter-oil-t14-259445
Price: 209.99 USD
Availability: BackOrder

$209.99

On Backorder — Expected to ship by Apr 30, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Keeps your K&N filter working like new. This 5-gallon container gives you plenty of oil for repeated filter services.

Key Features

Specially formulated — works with K&N cotton air filters
Maintains saturation — lasts until the element is cleaned
5 US gallon container — plenty for repeated filter services

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

K&N 99-0555 is a 5 US gallon container of air filter oil. K&N Air Filter Oil is the only oil specially formulated to work in combination with the cotton fabric in K&N air filter elements providing a superior air filtration system. When used as directed, it quickly penetrates the filter pleats, where it remains suspended in the cotton fabric. Saturation is maintained until the element is cleaned with K&N Air Filter Cleaner.