Spectro's technology provides a significant step forward in air filter oil.  Its high tack synthetic formula traps and holds dust even after hours of vibration exposure.  With Spectro SX Air Filter Oil dust can't work its way through the filter the way it does with other filter oil products.  Use with SX filter cleaner for complete filter maintenance.  Fast, easy to use and it won't dry out the filter.  Ideal for all OEM and aftermarket air filters.  Do not use on paper type filters, use only on foam or gauze types like K&N.