I know when I used the Motorkote in my 01 Sable, the fuel mileage went up to 29 mpg which was at 24-25 mpg. I read the Motorkote site, all they say is that it is hyper lubricant. I can notice that when using I have No engine noise. What is interesting about the product also is that you do not have make room for it. The most you put in is 16 oz. for a V-8 engine.
Some here may call it snake oil, I think it good stuff.