It would be kind of interesting to do a heads up test with todays oils and an older oil. That would be to see if the new products are better or hype. hmmm?
The NMMA has all the old data, pictures, and tested parts and today's oils are much much better than the earlier ones were.
Just an observation (not scientific)
Newer auto engines run a lot lower viscosity than they used to. 5/20 is now the norm, where 10/30 or 10/40 used to be depending on driving, weather conditions etc.