I'm having a hard time accepting moisture entrapment of an oil filled sealed plastic container, to any amount, to be detrimental. That being said, not sure a simple shake before using wouldn't allow its use in one's lifetime, after that, it will be a collector item anyway.

This assumes, reasonable temp storage conditions and no UV. The oil will surely last another million years, and the additives really have nothing else present to precipitate break down, or separation, except gravity, if that is a possibility.