I think we're misunderstanding each other. What I don't get is where you're getting the evidence for this claim:
> If he were to eat that well calculated amount of olive oil everyday his weight would stay constant.
A source for this is needed. The study you provided, as far as I can see, says nothing of this. You're just assuming it's true, and I don't understand how/why.
That a gram of fat is roughly 9 calories? You seem to believe that at some amount of regular ingestion it will start getting processed differently? I'm not sure what kind of a paper you'd like, I don't think anyone will come up with specifically olive oil.
As per your other reply to the same link
differing degrees of nutritional satisfaction per calorie ingested
Yes it's commonly thought to work that way, there are indeed differences - but they're tiny. I might try to dig up relevant papers, but as far as my memory goes, the difference was at best around 3% with certain kind of protein.
