I have had two M112's (still have one) and my dad and brother have them also. Been running them all either on Liquimoly Supertech 5w40, or Mobil 1 0w40.

I have found the engine seems to run and idle quieter on the Liquimoly oil vs the Mobil 1....I've noticed this among several engines, including my M116 and OM601

The M112 is a very robust engine, arguably one of MB's best ever.

We use the same oil in my dad's SL which is a M113 (just a larger M112)

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