An oil sump, preferably made of plastic or metal, is provided for engines or transmissions, the oil sump comprising a filter housing including a filter housing top shell, a filter housing bottom shell, a filter medium, a filter inlet, and the filter outlet, and having an oil drain opening in a floor area of the oil sump, implemented in such a way that it is closable using an oil drain screw having external thread, which comes from the oil sump outer side. The oil sump also includes a carrier unit having a frame, on which the filter housing is fastened and which is used as a seal upon fastening of the oil sump on the associated unit, in particular on an engine block or a transmission unit.