It would be very hard/expensive for them to do it. They would have to buy or blend a low quality oil, run it X number of miles and tear it down to hopefully show that.
Or find an otherwise dirty engine and tear it down to confirm it. Then also confirm the life of that vehicle without mechanical issues, etc.
Then put it all back together and run their oil. And show that it “cleaned” it. You’re talking tens of thousands of dollars for all these tear downs and re assembly, then the testing and the rest.
It’s part of the reason I don’t really “buy” the marketing material put out. As well there’s no corroborating evidence that if you run a major brand full synthetic, that your engine will be varnished like that.
Add in the people who are purchasing amsoil or would purchase amsoil, aren’t the ones going and getting no name brand oils at quicklubes or such. Going from a 19.99 oil change special at lubesRus to amsoil DIY is a big change.
Which goes into my theory this is just a GF7 byproduct. Using a better oil, with a complete additive package will slowly clean things if they happen to be dirty.
As for what’s the secret ingredient? I don’t think there really is one. I’m not privy to the chemical make up of each additive package. As that’s highly confidential information. Even if I was, I couldn’t share it without a breech of trust. But the public data from the additive makers, have shown increased sludge and varnish protection as well as reduction. That’s part of GF7 development.
