Vtg Drip Feeder Hit Miss Engine Oiler Glass Chrome Small Motor Equipment IndusVtg Drip Feeder Hit Miss Engine Oiler Glass Chrome Small Motor Equipment Industrial needle valve oil cup or a sight gravity drip feed oiler. It is a type of lubricator used to provide a controlled, visible supply of oil to machinery. Drip feed oilers are single point lubricators that are mounted directly on the lubrication points of a machine. The oil is dispensed from a transparent reservoir through a needle valve, allowing the operator to manually