This bulletin is believed to be a reponse by GM to its dealers who are selling PTFE additives to their customers. In the bulletin GM warns about the problems with accelerated engine wear after the use of PTFE oil additives. The environmental consequences of using PTFE additive have not even begun to be assessed. The fluorine combines with tydrogen during combustion to form gydroflouric acid. Debby's engine serces as a clear illustration of how much PTFE actually does get into the combustion chamber.
Hydroflouric acid can cause extreme damage to the exygen sensor, catalyst and exhaust system.
I have spoken to others who had the same experience. After talking with many engine rebuilders I believe that synthetic oil, changed on a regular basis is your best bet. In my opinion, Slick-50 is not so slick. I sill stay with Slick-50, since it is presently the hottest name in the oil additive market. Slick-50 is PTFE, Teflon, in a carrier fluid of conventional engine oi.