MC - I like Seafoam and use it occasionally in the fuel system of bikes and lawn equip that I suspect may have carb issues.
I personally do not use any type of additives to the oil, I feel there are enough already. I'm not saying don't do it, just saying I don't feel the need for it.
And I have no idea what it is! It ain't sea foam.
Fair enough. They do have an extensive FAQ and explanations on their website, no point in rehashing it here.
"Since Sea Foam ONLY contains petroleum based oils,..." (emphasis was theirs)
It is only oil, but since "oil" can mean lots of things...
I suspect that it was originally sold to marine applications hence the name. Lots of motorboat illustrations on the website.
As ekpent mentioned, and they mention in their website, it will free sticky rings and lifters. I have experienced this as well on a lawn tractor. Smoked after sitting all winter. A dose of SF stopped it, I suspect a stuck ring.
It doesn't require changing the oil after adding. BUT, as it reliquifies sludge, your oil will get dirty and they recommened changing dirty oil. So that's kind of a run around the barn way of saying change the oil after using.
