A four-piece oil seal is disclosed that includes a resilient expander spacer having an axial top edge, an axial bottom edge and an axial intermediate portion therebetween. The axial intermediate portion of the resilient expander spacer includes a plurality of intermittent radially outwardly extending tab pairs that define circumferential slots. A first rail contacts the axial top edge of the expander spacer. A second rail is disposed within the slots formed in the radially extending tabs. A third rail contacts the axial bottom edge of the expander spacer. Preferably, the radially extending tabs are in the form of intermittent U-shaped ridges and include spacer lugs located at a bridge portion therebetween. The ridges form center openings in the expander spacer while the spacer lugs maintain separation between adjacent rails.