When should I add Sea Foam High Mileage to my oil? [SOLVED]

Could I add Sea Foam High Mileage to an engine that just recently had its oil changed? I currently have about 400 miles on my new oil change and was wondering how long an engine should run with this in it.

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Jim D.
Jim D.
3 years ago

Great question Luke. Even though we recommend adding High Mileage to your crankcase 100 to 300 miles before each oil change, it is OK to add at the beginning of the oil interval. In any case, it’s safe to use for the full life of the oil.