10-15-2020, 05:29 PM
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#31
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Senior Member
Join Date: May 2010
Posts: 2,789
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Re: Marvel Classic Motor Oil
Quote:
Originally Posted by tubman
It is my understanding that any motor oil that has a "50" in it's viscosity (e.g. 20W50 mentioned above) has adequate zinc in it. When I was racing my dirt car with the hemi, I used Mobil 1 15W50 that had 1200-1300 ppm zinc, just like the bad old days.
I will admit I haven't checked lately.
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Never knew that 
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