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Re: Engine Oil Recommendations
At this point it should be mentioned that ZDDP is acidic and adding too much will turn the oil corrosive. This is cause of many new cam failures when people add more than recommended amount of Zinc additive thinking more is better.
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1969 c-10 Step Side Long Bed. I-6 250cid =  = 1969 Pontiac GTO hard top. 400, 4-speed.
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