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    Shell Rimula Ultra 10W-40 (UHPD oil) in gas engine

    Thanks for everyone's input. I would go with Rotella instead.
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    Shell Rimula Ultra 10W-40 (UHPD oil) in gas engine

    1988 BMW E30 with M20 engine
  3. N

    Shell Rimula Ultra 10W-40 (UHPD oil) in gas engine

    1st post here, and have some questions regarding the "cheap engine oil" I found locally. It is a synthetic oil with a price of minieral oil in my country (same cost as Rotella T 15W-40) It's the Shell Rimula Ultra 10W-40, UHPD diesel engine oil. It has no API S ratings, instead all the ratings...
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