I came here originally 13 years ago (actually longer, I lurked for about a year before registering), I knew a little about oil, almost nothing about filters. I had a basic automotive knowledge base.
It was also a time where there were quite a few members posting that did know a lot about oil, and also a time where there were some big differences in oils, and major changes were happening.
I have learned a lot about oil, as well as many other things.
As said, this site has other areas besides oil discussions.
The truth is, I don't care much about what oil I use.
I use this site a lot for oil/filter deals. I will use the cheapest name brand (or store brand) oil I can get.
I am not an extended oil change person for the most part (although I have finally decided to do an annual oil change on my truck, but is I go by the book for viscosity and have learned xw-20 oils are not the death of an engine.