Note: Just in case if someone say this is off topic, the oleophobic coating should be the topmost layer... by common sense.
After I had applied and taken off tempered glass screen protectors several times on my iPad Air 2, I once made several drops of baby oil onto the front glass to test the oil repelling capacity, and it still worked perfectly. I'm not saying that the adhesive layer of the screen protector would never wear the coatings of the screen, but I would say normally it won't "peel off completely".