There are not that many oil companies out there. The big companies make the private labeled oiled. Really, if it meets the specifications set out by your manufacture, than I wouldn't put to much more thought into it. Amazon, Supetech, Autozone, Napa, ect are all made by one of the big guys.
Proper change intervals and meeting the specifications for oil and filter are the most important things.
Also remember, change intervals are set up for many reasons. Usually the are conservative and usually oil is "fine" at that point. But, the unknown isn't fine, and changing oil regularly minimizes risks of failure.