Funny, the OM616 and 617 I have hardly consume any, I change at 5000 miles and never need any top ups. Maybe its dependant on the type of oil used. I use Delo 400 or Delvac MX, even driven aggressively on a hot day, I hardly need to top these engines up.

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99 Gurkha with OM616 IDI turbo

2015 Gurkha with OM616 DI turbo

2014 Rexton W with OM612 VGT