Been researching Xado extensively. True, the relatively low engine temperatures would not create the cermet coating. But Xado contains nano particles of an element (i.e. phosphorous) that creates a high-heat catalyst to bond the metal shavings in your engine to the ceramic nano particles in Xado to create a cer-met coating (which is stronger than either an individual ceramic or metal).
The science doesn't appear to be snake oil. There are thousands of research papers on cermet. Whether or not cermet works in this application is the big question. Plan to do extensive testing within the next 2 weeks and will re-post results.