Good points. I think what makes Valvoline Restore and Protect credible is not the photos they shared, but all these members of the forum sharing their experience.Because I legitimately believe other companies have not yet figured out whatever particular chemistry Valvoline has discovered.
Valvoline has said it was an “accidental”discovery. The cleaning action is novel and unlike existing chemistries.
Mobil 1 Advanced Clean for example, appears to be using PAO, which is a known entity. It can help “clean up an engine” in very general terms, but note that Mobil makes no specific claims of cleaning piston ring lands, which is the #1 culprit of oil consumption on most modern engines.
Whereas Valvoline, with their proprietary formula, specifically calls out Valvoline Restore and Protect’s ability to clean piston rings, and provides photographic proof from their testing. Valvoline Restore and Protect has now been on the market I believe nearly 2 years now, and plenty of real world use across many different engine designs has seemingly backed up their claims.
While I am optimistic that Mobil 1 Advanced Clean may be a “next gen” cleaner like Valvoline Restore and Protect clearly is, I’m not so sure that it has any “special sauce” beyond a good dose of PAO, which can already be had in their Mobil 1 ESP line for example.
And I don't think having PAO matters much in a cleaning oil. AN might, or some esters, but thats about it.