Engine oil issue Options

[sixaddict]

I was talking to a non Porsche engine building /machine shop yesterday and he told me new oil formulation regulations means we need to add zinc additive in older cars
Any one out there have knowledge ( versus opinion) on this.
I use Brad Penn but he seemed to indicate this is industry wide.
He was not trying to sell me anything

[GeorgeRud]

I'd heard that even Rotella had changed formulations though it was a go to oil for many. Besides valves, the cam lobes need the ZDDP in flat tappet engines. It's also best to use an oil with appropriate ZDDP levels rather than trying to blend your own with additives.

[Mark Henry]

I'd heard that even Rotella had changed formulations though it was a go to oil for many. Besides valves, the cam lobes need the ZDDP in flat tappet engines. It's also best to use an oil with appropriate ZDDP levels rather than trying to blend your own with additives.

Yes, but Rotilla is still up there in the good zone.

I use Chevron Delo 400 15w40, another similar dino diesel oil with about the same levels as the old RotillaT . Delo is the oil Henry at Supertec recommends.

One thing about running the cheaper diesel oil is it's not near as expensive as some of the bouquet oil's. Thus you are more likely to change your oil often, which is just as important as which oil you use.
BTW I don't recommend Delo in the thinner grades, for some reason they have a different additive package by my research.