I remember that in my gameplay I had to click it three times for me to receive the oil. I'm not sure if it is a random amount of interactions or that the game has been patched, but I was unsure wether it mattered so I decided to write 'multiple times' just to be on the safe side :)
As for the endings, I have to agree with you. I am still a bit in doubt whether that is really something that needs to be changed. I also followed the video walkthrough from
BiLLzuMaNaTi for quite a bit (
https://www.youtube.com/watch?v=D_7G5WObFrE) where it is also mentioned as the 'better ending'.
Anyways thank you for your honesty and tips to improve this walkthrough!