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

This cap has always infuriated me, because sometimes you have to pull it hard and quite abruptly, which leads to oil spills. And sometimes the ring breaks, and then it’s very difficult to open the oil. But not so long ago, I found out why this is really necessary.
Now I’ll tell you everything in detail. The point is that the plug must be put back in its place, but before that, you need to turn it over.

After that, press the cork inside the bottle so that it is fixed between the slots.

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