Since 1947 ZeeLine by Milton™ (formerly National Spencer) has been an American owned and operated company. From the beginning, we have been providing our customers with the best products for the ever changing Automotive, Commercial, Heavy Duty and Industrial markets. Within these four industries, our products service a wide array of markets that include automotive quick lubes, dealerships, fleets, commercial vehicle centers, agriculture, trucking, municipalities, railroad, marine, industrial and mining.