I believe Mercedes lost a class action lawsuit regarding the issue on M112 engines with Dino Oil Changes every 10k-12k miles. Result was they had to cover certain engines for an increased warranty period for oil consumption. Do a search and you should find more info.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record