[QUOTE=desertdriver;3640176]my problem is that I want to see hard evidence that significant amounts cling to the parts, enough to provide a film. QUOTE]
I did not say that amounts, sufficient to provide a lubricating film, cling to the metal parts.
I only stated that syn is purported to cling longer than non syn. I did not say anything about it being in sufficient quantity to lube. Only that it clinged longer by the days stated. And if true that is a good thing in itself.
It would be easy to test at home dipping samples in each lubricant and wait a few days to see what happens. One can feel the surfaces. Yes, this is not scientific and it does not prove anything other than possibly which maintains a film longer.
All vested interests aside, of course.
540, Dirrezas (4) @ 275/35-18 ea, Eibach springs & bars, Bilstein Sports, Dinan Stage 2, slotted ATEs, Hi-Temp HTP pads, SS Lines, UUC-SS, White/Tan, Bling-free & Stealthy