One possible embodiment of the invention could be an oil seal for a DELCO REMY 50DN heavy duty automotive alternator comprising a top collar; a bottom collar nested within the top collar to form a ring body; an annular polymer sealing member attaches to the top collar to form a mating flange that generally extends from an inner edge of the top collar to further denote a portion of an inner passage of the oil seal, the mating flange forming clockwise orientated splines to substantially denote a set return grooves in a spaced-apart, parallel, and clockwise orientation; wherein during alternator operations, a spacing collar spinning within the inner passage brings oil from the interior of the alternator into contact with the mating flange, the splines on the mating flange then direct the oil to the return grooves, which then direct the oil back towards the interior of the alternator.