Abstract: An oil filter cleaning system includes a piercing apparatus for cutting openings in a used oil filter to allow drainage of excess dirty oil therefrom. A rinsing and cleansing mechanism is provided atop a chamber containing liquid solvent and includes one or more nozzles upon which the original bottom opening of drained oil filters are mounted following which, a pump is actuated to inject solvent into the filters and which is expelled from the pierced openings. Thereafter, pressurized air is injected into the filters from the same nozzles to remove all residual solvent and oil therefrom. Separate piercing and rinsing and cleansing stations may be provided for treating one filter at a time or alternatively, these stations may be combined into one station operable to simultaneously treat a plurality of filters. In the latter instance, it is proposed to include a sorting device to facilitate the accumulation of several filters having the same diameter in order to accommodate a gang piercing mechanism.