Well, we have certainly yanked the thread off topic.
Having said that I milked people like poster #15
for years for sales incentives when I was in parts. They believe what they will and a fake video is commonly the best way to convince them of a thing, never mind that a thinking person can commonly shred those same videos in a second. You simply play to those beliefs and lead them around like a dog on a leash. Better quality oil is good product but if the car runs on what is cheaper it's quite frankly stupid to use the higher priced product unless you have to have it for your head like a drug. Like running premium fuel on cars obviously designed to run on regular and thinking you are 'doing something'. You ARE, but it has nothing to do with a car. Why my favorite saying even now 40 years later is................................fix the driver first and fixing the car then becomes so much easier.
It is what it is.
I personally use product just good enough to do the job well. Anything more and you are wasting money along with the self bullsh-tting of yourself. I now use Walmart STRAIGHT 30 weight SuperTech conventional oil at $2.66 qt. At 9000 mile OCIs here in Texas. I make MONEY doing it like with everything else I do with a car. Can't kill them like that and no noises other than normal ones.
Look here. I raced American Motors cars back in the day, we had AMX street cars that ran in the tens through mufflers at 130 mph 1/4 mile and stomped the crap out of most 454 Camaros unless we built them. Also did lots of work on much faster cars from 800 hp. AMCs up to pro stock 700+ inch BBC 1500 hp. Camaros that ran 200 mph quarters. I KNOW what oil can do and not do. We had a garage/speedshop directly across from the local GM dealership and we gave those boys utter fits. Whenever one of our 390-401 inch cars went around one of their 454 inch ones in HIGH GEAR it caused plenty of trouble. Later on, most of the racers at the GM place let us build their 454s and they were coming out of my ears there for a long while. We built plenty of the other legendary domestic engines of the times as well.
Splitting hairs here. There can be ever so slight differences in noise but commonly it means the oil or whatever was dead and used too long. That's a DRIVER problem. As far as a view that simply changing from a good oil used to a new oil of still good brand, if you are hearing noise you got something wrong or are imagining it. Some can seem to change noises simply because most oil used now is too thin, and they got people trained again like dogs to both accept and demand that. I for one pretty much NEVER run a lighter weight at cold oil, at least as far as the current oil specs go now. Every person on the planet will argue with me over it but I know a couple things the rest of them apparently do not.
Look up start up wear at cold, what the oil world wants you to think is not quite true. If you want to argue about it, then spend a second giving some thought to why now all cars seem to have to have oil filters now with anti-drainback valves when further back in the past they were not needed virtually at all. Of course the oil companies will not mention a word about that, you're supposed to overlook it. Better left stupid you are...........