What do we lose with API SP oils and older engines?

[UgoFixit]

Good question. I also would like to know. I've got a 22yr. old Buick and oil formulation has really changed in twenty years.

I'm wondering if newer formulations create more wear (Less zinc, moly etc.) than the older oils. ?

Api sp great for low wear in your timing chain. If you find one with the a3/b4 a40 LL-01 like the euro oils it gets you a longlife 10k+ oil change interval as a bonus.
Castrol edge Mobil 1 euro Quaker State Euro Valvoline euro Triax Euro whichever on sale

 

[kschachn]

Api sp great for low wear in your timing chain. If you find one with the a3/b4 a40 LL-01 like the euro oils it gets you a longlife 10k+ oil change interval as a bonus.
Castrol edge Mobil 1 euro Quaker State Euro Valvoline euro Triax Euro whichever on sale

Which Triax has Longlife-01 approval? Or any approval for that matter.