Originally Posted by aquariuscsm
So in layman's terms,are they saying thicker protects better,or that it doesn't really matter and that they protect the same?
Depends what you are looking at, one data set indicates that when you get to HTHS of 2.6, going above that doesn't give you any noticeable additional wear protection for those scenarios.
Another one indicates that thinner oils protect better at high RPMs with low loads and the thicker oil protects better at low RPMs with high loads.
I find that last point interesting as it appears w20 oils might be perfect for 4-bangers that turn higher RPMs in general where as if you have a larger engine (OR any engine with CVT) that spends its time in the lower RPM range, you might benefit more from running something like a 0W-40.
There isn't a one-answer-for-everyone here, sadly.