Thoughts on ZDDP Zinc oil treatment?

[93097004xx]

I’m using Valvoline VR1 20W50

I know in previous older threads there seems to be 2000 responses and 2000 opinions..


https://lufteknic.myshopify.com/products/zplus-zddp-zinc-oil-treatment-additive


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[930cabman]

I recently had the head studs and some other items repaired on my 1975 911s. The car ran great, but developed a smoking problem. I called the repair shop and they indicated Brad Penn was used in the crankcase. I switched back to the Castrol 20w 50 I had been running for years, the smoking problem disappeared. Just my experience

[matthepcat]

Brad Pen is no longer Brad Pen. You have to buy Driven Racing oil to get the good stuff now: https://www.pca.org/story-behind-drivens-new-gp-1-oils

[mark houghton]

I used to use Castrol, later switching to VR1 solely for the ZDDP content.