STP Ceramic oil treatment

I used to put Winn‘s Friction Proofing in my 1964 AH Sprite. It was like water and stinky. The car was pretty much worn out at 55,000 miles.
Blame Winn’s or the 4,200 RPM at 70 MPH.

I think just blame British Leyland….
 
Used Wynns Friction Proofing in my 1985 Buick Skyhawk all the time; never seemed to do anything for it either way. Engine was the only good part of that car basically.
 
Just added this to my 2.3 ‘07 Ranger and it’s very slick. The question is for how long? I remember using a Teflon product called Tufoil, and it too was very slick. For about a week, it seemed.
 
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