Oil filtration unit for removal of solid contaminants from contaminated oil, the oil filtration unit comprising: - a housing which comprises a housing inlet adapted to receive contaminated oil from the surroundings and to release the contaminated oil to an inner opening of the housing at a first pressure (p1) and a housing outlet adapted to release filtered oil to the surroundings, and - an oil filter for filtering the contaminated oil, the oil filter being arranged in the inner opening of the housing and comprising a filter inlet defined by an outer surface of the oil filter , an inner filter volume adapted to receive filtered oil at a second pressure (p2), where the second pressure (p2) is lower than the first pressure (p1), and a filter outlet inside the housing providing fluid/liquid communication between the inner filter volume and the housing outlet in order to release the filtered oil from the inner filter volume , characterised in that - an end plate of the oil filter comprises the filter outlet, where the entire end plate comprises a porous material through which the oil may flow, so that at least part of the end plate forms part of the filter outlet, - and in that the filter outlet comprises a hydraulic resistance forming part of the oil filter, said hydraulic resistance providing a fluid/liquid flow restriction between the inner filter volume and the housing outlet in order to increase the second pressure (p2) inside the inner filter volume and to release the filtered oil from the inner filter volume to the housing outlet at a third pressure (p3), where the third pressure (p3) is lower than the second pressure (p2). - a housing which comprises a housing inlet adapted to receive contaminated oil from the surroundings and to release the contaminated oil to an inner opening of the housing at a first pressure (p1) and a housing outlet adapted to release filtered oil to the surroundings, and - an oil filter for filtering the contaminated oil, the oil filter being arranged in the inner opening of the housing and comprising a filter inlet defined by an outer surface of the oil filter , an inner filter volume adapted to receive filtered oil at a second pressure (p2), where the second pressure (p2) is lower than the first pressure (p1), and a filter outlet inside the housing providing fluid/liquid communication between the inner filter volume and the housing outlet in order to release the filtered oil from the inner filter volume , characterised in that - an end plate of the oil filter comprises the filter outlet, where the entire end plate comprises a porous material through which the oil may flow, so that at least part of the end plate forms part of the filter outlet, - and in that the filter outlet comprises a hydraulic resistance forming part of the oil filter, said hydraulic resistance providing a fluid/liquid flow restriction between the inner filter volume and the housing outlet in order to increase the second pressure (p2) inside the inner filter volume and to release the filtered oil from the inner filter volume to the housing outlet at a third pressure (p3), where the third pressure (p3) is lower than the second pressure (p2). <EOS>