MANN+HUMMEL Purolator Filters LLC, more commonly known as Purolator, is an American manufacturer of oil and air filters, based in Fayetteville, North Carolina. Since 2013, it has been a subsidiary of German filter manufacturer Mann+Hummel. Purolator manufactured and sold the first commercially available automotive oil filters starting in the 1920s. For several decades in the late 20th Century, Purolator operated a large North American courier business known as Purolator Couriers. Canadian courier Purolator Inc. and its subsidiary Purolator International are the successors of that business but have had no direct relationship with their former parent since 1987.