Few things - marketing is what you do when you market a product. All products are marketed and use marketing. That word seems to be the scapegoat for people when they don't like what they are seeing. We have no idea at all if Amsoil SS, HPL can clean EXISTING ring deposits. Pure speculation. Sludge and varnish, yes. Maybe ring deposits but again I don't know that. Valvoline had to make an oil with 50% Group V to do so, which far exceeds any Euro oil on the market by a long shot.
Valvoline ran the tests providing evidence it works and would be in some big trouble if they were lying about this.
There is real data. It's the others that don't have the real data to say whether they can clean existing deposits. Keep clean vs cleaning existing piston deposits are two different things. All oil formulations have historically focused on keeping piston deposits limited. R&P removes them and brings it to a negative.
Is R&P better than M1, Amsoil or HPL? NO and no one is saying that. However it has a unique ability to clean and that technology, whatever it may be, may find itself into other grades in the future.
View attachment 252100