Abstract: The invention discloses an assembly for collecting residual motor oil from standard plastic motor oil containers comprising a housing with two inlets sized, configured and positioned for receiving plastic motor oil containers. An outlet at the bottom of the housing adapted to be placed within a residual oil collection unit substantially closes the collection unit, permitting collection of contaminant-free residual oil. The assembly further includes a base welded to the housing with support arms for the plastic motor oil containers. Multiple assemblies may be stacked to provide the ability to collect oil from additional motor oil containers.