3.0 LITER PHEV. Oil return tube o-ring. PartQualifier: upper. upper. At Turbo. Return. Turbocharger Oil Line Gasket. Turbocharger Oil Line O-Ring. Sealing. Drain o -. Inlet o -. Outlet o -. Return Seal. Turbocharger Line Gasket. Included with: Oil Inlet Tube, Oil Return Tube.