New Quaker State Oil w/ Zinc

Mojoe9955 said

I just changed the oil in my Duster this morning and used this. It was about $8 a quart at AutoZone. I saw it a couple days later at Walmart a little cheaper, but only 1quart on the shelf.

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I decided to use the regular conventional GTX 2050 with trick flow sink additive because that oil right there is a blend. I made the mistake of putting VR1 in my old engine I don't think it hurt it. But it immediately found a couple of leaks because it's full synthetic. It also does not have detergent so it got dirty within 2 weeks. Not only do we need zinc but we need a detergent oil. The famous Pontiac engine builder told me back in the '80s for my SD455 to run Quaker State 20-50 but not racing oil.
So most people with old engines now is making a mistake running anything that says racing on it that's 500 miles plus most of that is synthetic now. Haven't seen any place I could get QT Defy at. And I've been out of game for 30 years because I stored the car.
Also on the VR one I was either burning it leaking it or both because it was going down. Fully synthetic is a mistake for old high performance engines for the street.
I found out they quit putting zinc and all in 1994 because it hurts catalytic converters.