aFe Power MagnumFLOW 90-50500 Air Filter Restore Kit (Single, Gold) 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) Gold color oil for use with all aFe PRO Guard 7 air filters aFe recommends recharging your aFe air filter every 20-30,000 miles