aFe Power MagnumFLOW 90-10021 Air Filter Oil (8 oz Squeeze, Blue) Highly refined filter oil captures the finest of dirt particles while still allowing maximum airflow Blue color oil for use with all aFe PRO 5R air filters Also available in 32 oz squeeze bottle (aFe p/n 90-10023) and 6.5 oz aerosol (aFe p/n 90-10022) 32 oz squeeze bottle also available in a complete restore kit, with cleaner (aFe p/n 90-50521) aFe recommends recharging your aFe air filter every 20-30,000 miles