If you want to clean out the engine. change the oil with Dello 400. Then run like normal. It's a good high detergent oil.
Sea foam or any other type additive breaks down the oil and it looses it's lubricity.
Sea Foam is like adding a half cup of diesel to the crank case. It turns it into water. Then you must change the oil several times to wash it all out. But no one ever does. So the fresh oil just goes back to water after a couple of days. I have never been a big fan of "cleaning" the engine on the inside. It's not like fuel deposits. But the fuel companies have fixed that problem years ago. Things cave changed since the 60 when the deposit were a problem. I remember when a peace of carbon would break loose and it sounded like the engine was coming apart.