Well my 93 has the same oil leak. Front Main Seal (AKA Crankshaft Seal) In the shop now. We ended up replacing the valve cover gaskets(they were leaking also) , alternator (Beck/Arnley) , Crankshaft seal (from lexus) , camshaft seals (both from Advanced auto) , Timing belt and water pump (these came from advanced auto also) , ...... My car has 220K miles and hopefully now that I have replaced the entire front of the motor, she will run another 150K.....Hopefully!!!!!!