My husband just asked your opinion, if you have one, on using Sea Foam motor treatment?
Sorry, don't know what that is...no opinion.
There are some very limited situations where it *might* be something to try. In general, you should avoid the need by proper maintenance in the first place. For instance, if you have a sludged-up engine, a Sea Foam treatment followed by an oil change *might* solve a real problem.
Not a place I’d want to be.