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As a result of the new exhaust gas legislation the significance of crankcase ventilation systems in combustion engines has drastically increased. Oil mist separation, which is a part of the crankcase ventilation systems, influences numerous engine processes, which directly or indirectly impact the emissions of newly developed combustion engines. The oil mist separator’s task is to retain the liquid oil parts and to return them to the oil sump. Thus, the oil mist separator reduces oil consumption and emissions. By continuously optimizing the oil consumption at different sources, oil separation from the blow-by gas is gaining significant influence on the overall oil carry consumption. In addition to reducing oil consumption, the development of highly efficient oil separation systems in crankcase ventilation it also rising in importance due to additional concerns.