It's intersting to see that the only sythentic oil that appears to have zinc is Valvoline. I wonder if the formulation of synthetic oil is different enough that the manufacturers of it feel it isn't necessary?
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North Dakotas fastest REAL GTO
10.10 @ 131 MPH in the 1/4
Hoping to get it back together some year.
www.jandjrepairandrestoration
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