Hello.
I have a problem with crankcase breather reaching the engine block to the original air filter. The breather hose has plugged in oil catch tank (hidden in front of a radiator at a height of a front bumper).
With a more dynamic driving the tank fills up quickly with oil. I have a standard air filter box, filter is K&N. Engine is 4x4 standard with no modifications. Oil is 15W50 Motul.
It looks as if the oil was literally sucked out by breather hose. After a ride of about 70km (including of highway driving at speeds up to 200km/h over short distances) it had sucked out from the engine of 0.5 liters of oil (almost a full catch tank, oil filter flooded with oil, air filter box the whole dirty with oil).
During the delicate driving everything is in order. I drove about 400km highway distance before with average low speed (about 100-120km/h) and everything was ok.
I checked the compression pressure on cold engine after a week of inactivity and it shows:
10.0—10.0—10.5—10.2
Could anyone help me, what would be the problem? I'm totally lost.
Is the engine completely outworn? (it accelerates well, doesn’t smoke blue when starting cold. There is no oil in coolant. The engine is not loosing the coolant.)
Even if the engine almost had no rings and was totally finished off, is it possible to draw 0.5L oil by breather on 70km distance? Would it be a typical situation?
What and how should I still check?
Thanks in advance for any help.

ps. sparks (DENSO IK20) looks like this: