No more messy oils. R2C and their parent company have a 65 year history of military and severe duty filtration. The R2C meets or exceeds in every category over the competition in this segment and it has the advantage of being serviceable. You will definitely save in the long run over one time use, throwaway filters. The patented synthetic filter media is highly durable and has an efficiency rating that far exceeds the stock element (exceeds 99.97%). Due to its unique properties it has the ability to shed dust cake while in use which mitigates restriction rise. The R2C is a dry element that requires no special cleaner or oil to service. It is serviceable !!!! To service the filter you simply blow it out from the clean side with compressed air or vacuum from the dirty side. In severe cases the filter can be soaked in a soapy solution rinsed and air dried.