I wonder if products like Seafoam or Marvel Mystery Oil really work on cleaning the
engine ( by adding to engine oil) or the carburator (by adding to fuel). I have used both and can't tell if sludge, etc. is removed. I usually add to the oil, run the engine for a while then drain the oil. A friend tells me I'm just wasting money.
engine ( by adding to engine oil) or the carburator (by adding to fuel). I have used both and can't tell if sludge, etc. is removed. I usually add to the oil, run the engine for a while then drain the oil. A friend tells me I'm just wasting money.