Pretending it did though, I don't believe it would do anything. Oil and water "hate" each-other. Endermen and water "hate" each-other. The enemy of my ene,my is my friend. Oil is the natural habitat of all endermen, and the only reason there isnt any oil in the end is because the endermen already absorbed it all.It's a ghost liquid. It looks like it's in there, but that's purely to look nice. If you actually entered the tank, you'd find that the liquid in question wouldn't do a thing to you.