The oil is the QS High Mileage oil and the VIS is whatever it says on the bottle.
Now, to the Teflon issue. Slick 50 is no longer made with powered particles as in the old days. You do not have to shake it up and no particles settle in to the bottom of the bottle. We all know about powered moly and soluable moly, well this is soluable teflon if that's what you want to call it. It is not purchased from DuPont, so I'm not even sure if it is teflon. I don't believe claims are being made that it last any longer than the oil change. It sure as heck won't plug a filter or oil passages or cause oil starvation. Heck, it might even help gas mileage by 1/2%.
Years ago someone said, if it's so good why don't the oil companies put it in their oil, well they did and it is selling like hotcakes to all those Slick 50 crazies.
Personally I don't use it or any other additives in a well formulated oil.