Sea Foam and zinc additive in oil [SOLVED]

I have a 1972 Cadillac in which I run conventional oil with a zinc additive. Is Sea Foam Motor Treatment safe to use with engine oil additives?

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Jim D.
Jim D.
2 months ago

Thanks for the question, Xavier. Yes, Sea Foam Motor Treatment is safe to add to the oil when other additives are already in the crankcase. It won’t cause any trouble. Add 1 ounce of Sea Foam per quart of oil.