After my cam went bad leading to an engine rebuild I did a ton of research on oil. Oil companies continue to change their formulas and continue to remove the things needed by non roller cams. This is true of diesel oils too.
Now, granted my engine is older (1972) but my understanding is they never changed the cam to roller so it still needs the zinc.
After all that research I started using Lucas Hot Rod oil because it has the highest zinc of any of them. You could run 50% HRO and 50% regular oil and still have more than most including rotella. The only real problem is this may cause eventual clogging of the cataly converter but personally I'd rather change that than the engine.
Last edited by Crankyolman : 05-20-2022 at 09:38 PM.