P.s. don’t bother with seafoam, it was a chemicals designed in the 1950s to help clean outboard 2 stroke boat motors carburetors and provide a lubricant protectant while storing it. It’s wasn’t designed to remove carbon build up in an engine and generally isn’t effective at cleaning carbonized oil/fuel from intakes and valves. Hence why folks have to mechanically remove them with picks, walnut blasting, ultrasonics and etc. if seafoam worked to remove carbon deposits no one would walnut blast anymore.....

On direct injection engines no it won't do anything for the valves so walnut blasting is a thing.

Not debating its effectiveness, but I'll keep using it as it gives me a warm fuzzy. The smoke show itself is very entertaining on old dirty engines. :D