Virgin Sn is 1-3, maybe 4 but still not so worried about 6ppm, when Cu is 5. Could easily be some brass somewhere. And all other wear metals are very low.Does anyone know if Speediagnostix uses gas chromatography? It seems like whenever I see one of their UOAs, the fuel dilution is always a very specific decimal value below 1%. Maybe I'm wrong...
Also, their additives values seem to drop way more dramatically between virgin and used than any other lab.
The tin does seem too high, as @twX mentioned. I'm very curious what the virgin tin value of this oil is.