Should I add Sea Foam when engine is warm or cold? [SOLVED]

Asked by Ian T. In California

Should I add Sea Foam when the engine is cold or when it’s warm?

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Jim D.
Jim D.
6 months ago

The only Sea Foam product that needs a hot engine when you apply it is Sea Foam Spray (intake cleaner).

For the rest of the products (Sea Foam Motor Treatment, High Mileage, Trans Tune, any others) it does not matter if the engine is hot or cold when you add it.

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