Mineral based oil.

Please clarify. As far as i know, all oils we have on the mass market are mineral based with some additives. Some counties allow calling oil as fully synthetic some don't allow to call it like that and it is called HC oil. Full synthetic is some super magic oil with greatest lubrication characteristics but life cycle is around 500 kilometers. So if i am wrong please clarify what kind of oil is better for break in, for example among Liqui Moly German oil?

Generally any "non-synthetic" oil is desirable for break-in.

As David said, and some also recommend a straight grade oil like SAE 30 or 40. You may be able to find a proper running/breaking in oil with higher zinc levels to better protect the valve train.

Personally, after a few minutes of running at a fast idle I'll change the oil and filter then, then after the break-in which, with modern machining methods and materials can be as little as 100miles, or up to 500 to be careful, another change of both to a full synthetic which will be used from there.

Thank you, dear colleagues. Searched for specially break in oil. Rare story to use here. But i think it is usefull.