[bimmer_lover]

Hi guys i bought secondd hand bmw g30 540i xdrive last year in may. It had then recently done service.
I drove a long tour in summer making Europe tour for around 12 thousand kilometers, and then drove a few thousand km's after arriving home.
Now I am thinking that i should have changed oil after the trip, or is the damage already done? Because im the trip we drove on autobahn aswell and high speeds often.


Anyways my question is, what oil should i buy now for my car? Should i just follow dealership recommendation? They said the car will know when to change oil and not to worry.
I feel like i should change oil but i want to use good oil that can tolerate harsh winter conditions (Scandinavia).

Any other things i should be aware of regarding my car? To look for when I bring it to my mechanic?car has gone 57 000 kilometer.

Thanks all