If There was just one motor oil I could choose the rest of my life, I would choose Schaeffer's. Probably as good as most synthetics and better then conventional motor oils.
I have a new car and instead of an oil filter it has an oil filter element. I have not done enough research on this to choose one brand.
I would occasionally use Chevron Techron in the fuel.
And the only oil additive would be Auto-RX.