Liquid filter, particularly oil filter

The present invention relates to a fluid filter, especially an oil filter for cleaning lubricating oil, especially for internal combustion engines of motor vehicles, comprising a receiving space for receiving an annular filter element having two axial end plates, a cover which is attachable for closing the receiving space in a casing, a formed in the housing untreated-side inlet, a formed in the housing clean-side outlet, an opening formed in the housing first additional opening, an opening formed in the lid second additional aperture, formed on the first end disk of the filter element first closure for closing the first additional opening and one on the second end disk of the filter element formed second shutter for closing the second additional opening.