No diesels here, but use synthetic in everything I own.

Ducati gets Motul 300V with OEM filter and the MB get an OEM fleece filter with Mobil1 0w-40. Ducati goes 6 months between oil changes, MB gets oil changed when FSS says it's time. No issues in either - oil looks fine when it comes out of both!

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.