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Old October 22nd, 2021, 05:56 PM
Prowbar Prowbar is offline
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Join Date: Dec 2020
Location: Friesland, the Netherlands
Truck: 1965 GMC 1500, 305E, SM420
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Prowbar will become famous soon enough
Default Re: '65 GMC 1500 project. From the Netherlands

Another oil with high zinc is the Lucas brand of Hot Rod Oil, available at Summit, I am using 20/50 high zinc in some of my flat tappet motors.
Ah yes, the Lucas is available here as well, but much more expensive. I know the Lucas should have a higher ZDDP content (I believe around 2000 PPM), this MPM stuff runs around 1200 PPM I believe. We'll see, it might still be 'overkill' with the oil bath cam and relatively low pressure valve springs.
But I'd rather spend a little more on oil than on a new camshaft and lifters..
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