I have used Seafoam for 22 years and it works great. You can put it down the intake to de-carbonize the engine. You can put it in the oil to free up stuck lifters and rings. You can put it in the gas tank to clean the fuel system. You can also use it like sta-bil in the gas tanks of small engines. It is 40-60 % light oil, 25-35 % Naptha, and 10-20 % Isopropanol. It can be used in gas and diesel engines and I have never heard of it harming any engine when used properly.
The first time I saw it in action was in the first shop I worked at while going to tech school. I was tuning up an Impala with a smallblock and it idled rough even after the tune up. The boss poured a can of seafoam in the oil and within half a minute the idle dropped 200 RPM and smoothed right out. I was sold on seafoam right then and i've used it ever since.
jetjock said:
Burning oil from any source isn't good for your engine and it especially isn't good for your catalytic converter if you have one.
I'm not sure I go with that one. Every time a cylinder fires 2 or 3 drops of oil are burnt normally off the cylinder walls. Diesel fuel is basically a thin oil and those motors go half a million miles before they need freshening up. Two strokes burn tons of oil all the time and they are quite tuff and powerful. I don't know what seafoam does to converters but their website says it cleans them FWIW. I have never clogged a converter by pouring seafoam down an engine.
Yes, there are other additives/ premium fuels that do what seafoam does and it is not a magic cure-all but it does do what it is supposed to do. If you really want to keep your fuel system clean you should put a bottle of injection cleaner in your tank at every oil change. I did that when I was a fleet manager and our entire fleet of 100 vehicles had almost no fuel related problems ever.
