. I think 10,000km on the break in oil is RETARDED. .
Thank you for the IQ estimate.
I changed my initial breakin oil on my Unimog at 18000 miles/430 hrs. It takes 30.6 qts of (suggested) synthetic. The owner's manual recommends oil changes every 700 hrs. Which is about 24-30000 miles.
Of course in addition to the huge capacity and a filter it also has an oil centrifuge. The non USA models don't have the centrifuge but also don't have EGR. My EGR fell off last summer. The non USA models have an OCI (oil change interval) of 1200 hrs (~40000 miles)!!!! using recommended MB228.5 oil.
PAO synthetics, which include Mobil1/Delvac and Amsoil products, have a markedly increased capacity to safely suspend soot and other contaminants (reference available).
Charlie
Delvac 1 SHC 5W40 MB228.5 ACEA E4/E5