aFe Power MagnumFLOW 90-50501 Air Filter Restore Kit (Single, Blue) Cleaner for use with all aFe Power washable, reusable air filters Highly refined filter oil captures the finest of dirt particles while still allowing maximum airflow (8 oz squeeze) Blue color oil for use with all aFe PRO 5R air filters aFe recommends recharging your aFe air filter every 20-30,000 miles