1 Gallon Filter Oil

K&N Engineering 1 Gallon Filter Oil is a premium air filter conditioning product formulated to maintain optimal airflow and filtration efficiency across a wide range of high-performance and street engines. This red-tinted synthetic oil is designed specifically for use on K&N reusable air filters, providing superior particle adhesion and dust-trapping capability while allowing maximum air volume to reach the engine's intake manifold.

The 1-gallon jug format delivers ample supply for multiple filter applications and re-oiling cycles, eliminating the need for frequent reordering. K&N filter oil is engineered to maximize the performance of the company's signature cotton-blend filter media by creating a tacky barrier that captures contaminants without restricting airflow—a balance critical to both engine protection and power delivery. The product's synthetic formulation resists breakdown across extended temperature ranges and varied humidity conditions, maintaining consistent performance whether engines run street duty, weekend track sessions, or continuous high-load operation.

Buyers maintaining K&N air filter systems—whether on turbocharged engines, naturally aspirated performance builds, or stock vehicles running K&N replacements—rely on this oil to preserve filter longevity and engine breathing capability. Proper oiling extends filter life to 50,000+ miles between cleanings while protecting against dust and debris ingestion. The generous 7.16-pound container supports both DIY maintenance programs and shops servicing multiple vehicles, reducing downtime and ensuring consistent filter conditioning practices across a fleet or project stable.