Tempest, this is your assumption. What if it is wrong?
Have you ever considdered this possibillity?.
I could be wrong too, and I will admit it then.
I have more than 1.3 million miles behind a steering wheel in different kind of vehicles(motorcycles, cars and trucks)and I think that every person driving a lot, will develop a pretty good "butt dyno", and also recognise different noises from engines. However, I still hold the possibillity open that my engine will be toast, within 20000 miles, because of Synlube.
However, it does seem that the engine in this car where I test it out, is improving and performing better than before.
I just report what I see.
Another thing that I have noticed, is the consumption of oil. I added one quart when I had been driving 7000 kilometers(4350 miles). This Add-oil cost 22 USD a quart. I have now been driving another 5000 kilometers(3107 miles), and the dipstick is full.
It can look like the oilconsumption is being reduced, though it is a bit early to say it is so. Also, the dipstick is shining, so it appears that this oil is keeping the metal free from deposits.
Am I annoying you, Tempest, because I don't report things that fits with your perception of what oil is doing and how it performs?