I don't really understand the point of this mod....
You can make 80 petroleum from 100 petroleum? I would rather take a mod which can destroy all gases / liquids.... Or is that a typo in the mod description? The image would then make more sense, if that is a typo.

No typo, this mod takes the basic oil processing that takes petroleum to make petroleum-gas and just speeds it up and makes it more efficienct.

But the basic oil processing doesn't have a recipe for turning petroleum into petroleum.
There is only one recipe to make petroleum from oil.

Well... yes... It's just that crude oil in British english is petroleum, just two ways of saying the same thing. This recipe takes crude oil, or petroleum, and turns it into petroleum gas.

oh, ok..
I did not knew that... It's just confusing when you don't know that.

Yeah, it's fine. It confused me a little bit too at first because I thought there was something wrong with the actual in game recipe and I was missing something...

^^

I don't think that makes sense :) For example from this website

Crude oil is petroleum which has not been refined.

Which could be the same as:

Sand is glass that has not been refined.

or

Iron ore is bullets that has not been refined.