I always threw away the oil cap: A colleague explained to me what it was actually for

This plug always made me angry because sometimes it had to be pulled out quite roughly, causing oil to leak. And sometimes the ring breaks, making it very difficult to open the oil drain. But not so long ago, I figured out why it was really necessary.
Now I’ll tell you everything in detail. The fact is, the plug needs to be put back in place, but first, you have to put it back in place.

Then push the cork into the bottle so that it is secured between the slots.

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