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Go get your oil changed, as the soak frees any deposits in the combustion chamber and dumps them into your oil sump.
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that would be a sign of needing rings or valve seals.
seafoam is a targetted product that has had many many alternatives over the years...in fact my local parts store, nor any that I have found even carries it. The internet told me about it.
personally, carb cleaner for top end and engine base cleaner for bottom end (many brands). The chamber is not the base pans world. why connect them , even with a chemical that leaves?
and the most imporant clean of all is a very very high powered high pressure burning hot steam clean with a powerful cleaner added...on the OUTSIDE of the engine.