I made that link a sticky in the repair and maintenance. Thanks helmutThis is from the Seafoam website.
"To clean built-up oil residues and contamination from the crank case, add 1½ oz. Sea Foam to each quart of engine oil. Sea Foam will slowly re-liquefy residues and suspend contaminants for easy removal. Change oil and replace filter when dirty."
Sea Foam | How to Use Sea Foam Motor Treatment