I don't recommend switching to a synthetic then switching back to conventional oil. Are you experiencing oil leaks or consumption? You're probably looking at valve guides and seals. 103 motors were known to develop those problems.


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Rgds,
Aaron Greenberg
MB technician
Precision Motorcars, Cincinnati, Ohio
'67 250SE Cabriolet
'77 450SL
'80 300SD
'85 380SE
'89 420SEL
'93 300E 2.8
'72 Alfa Romeo 2000GTV
'74 Jensen Interceptor Mk.III
'81 DeLorean DMC12