gunk
Hope this helps.
The can tells you how much to use per quart of oil you have. Just pour it in, run the engine on idle for a bit (oil goes to nominal temp, 20 minutes, whatever...) and then change the oil.
Seafoam is a cleaner that can be put in the itake, or added to the gasoline and so on. I dont know much about Seafoam, but AutoRx seems safe.
The AutoRX website has info. I have never looked for a Seafoam website.



