When to add Sea Foam to oil [SOLVED]

I just got the oil changed in my ‘05 GMC sierra with 200,000 miles. Should I go ahead and add 6 oz. of Sea Foam t the oil now, or should I wait until 100-300 miles before my next change?

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Jim D.
Jim D.
2 years ago

Thanks for the question, Nicholas. You can add now or wait until the 100 to 300 mile recommendation. The most important factor is that 100 miles is the minimum time needed for Sea Foam  to run and circulate throughout the heated engine crankcase.