Best oil to use...

[68Biscayne427]

I'm no petroleum chemist but I think the single biggest thing you can do to protect your motor is to change your oil - often... My personal opinion is a lot of it is hype. I am sure some of the more expensive oils are "excellent" at what they do, but I don't race my car, I just drive it to shows and when we have sunny days. If I was racing then I would probably have a much different opinion.
Like you, I have used a lot of different oils in my cars and never has one bit of trouble. But one thing I did was change them often.... My $.02.

[Salvatore]

I would say after the initial break-in if things are going well you are probably alright. You are right Joe it does not have to get or be so scientific. I have always used conventional oil but as the properities come out I try to choose the oil that has the most/best properities that we were used to in the past. To answer your question probably nothing would ever happen to our engines because how we treat our cars and the maintenance we give them.