Thread: Age old question:M103 or the M104 engine?
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Old 01-03-2017, 09:33 AM
Ferdman Ferdman is offline
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Join Date: Aug 2002
Location: Southeastern PA
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dynalow, AFAIK factory fill on that vintage MB automobile was 15W40 oil. I run Mobil 1 15W50 year round in our 124 automobiles.
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