Abstract: A reusable liquid filter assembly, such as an oil filter, is provided comprising a housing with inlet and outlet ports, filter means removably mounted inside the housing, means for holding the filter means inside the housing having tapered lengthwise slots for increased liquid flow, bypass valve means for providing a passageway between the inlet and outlet ports when the liquid pressure exceeds a predetermined value, means for alternately sealing and opening the housing to remove or insert the filter means, and a plurality of gasket means for permitting the filter assembly to be cooperable with a plurality of engines. An internally threaded nipple is also provided for insertion into the outlet port for changing the size thereof to permit use on a plurality of engines.