Germany has the right idea! The manufacturers of each vehicle should dictate the exact formula for each respective engine. Modern vehicles do have certain specifications. Therefore; we won't have to try a dozen different oils on our vehicles. But, we have many choices here in the States!
Always remember "Planned obsolescence."
1994 Montero SR 3.5 DOHC, 133,xxx
Fram Ultra/ Snorkel with Pre-filter