Teflon is PTFE. Coke is cola. All that silly name brand trademarked...stuff to keep Dewpont happy.
QMI has PTFE in some of their products, not that you can find them anymore. Their website lists some.
I haven't seen the 'need' for ANY additives for the typical consumer. But, many that I've used work surprisingly well. I truly would like to see some real world test data that backs up any claim for or against these additives. Until then, its a personal choice with EVERY oil additive out there.
Graphite, moly, boron, ceramic, tungsten, PTFE, micro-lubricants, plant or animal esters, titanium, zinc, phosphorous, calcium, magnesium, lead, antimony...all serve their purposes. As long as there is ANY wear in an engine, there has to be something out there to eliminate or reduce that wear.
Problem is, the market is concentrating on MPG and emission life longevity.
I truly don't think that the teflon, ie PTFE, needs to stick. When your normal lubricant reaches its failure point, you hope that whatever "insert brand" is in abundance at the location to prevent damaging metal to metal contact.
I also have NEVER seen any sludge or filter clogging with ANY of the products that contained PTFE/Teflon. I hear of the hearsay scare stories. But, those engines would sludge with regular oil and neglect anyway. Too easy to blame something else.
BTW, tungsten has caught my interests. Its superior to moly, teflon, and graphite in greases and industrial lubes. Now, where can I get some nanoLub for my engine?