[Randy Larsen]

I recently asked a question of a poster on youtube.com what would work to clean the inside of my truck engine and he recommended Seafoam Engine Treatment.

I've never heard of it, so if you've used it, let me know what results you got and how you used it.

Maybe others will learn something from this thread too!

[Chickensoup]

Isnt that when you take a long drive off a short pier?

[traditional1]

Yes; in my fuel tank in my boat, to keep the carbon buildup in my 2-stroke motor always clean.

I've not used it in 4-stroke motors, but the action of the solvents would be to remove deposits and keep the fuel system clean.

[meatloaf]

I use in for small engines and vehicles as a gasoline additive. Seems to work.

[Nervous Tick]

I used it a few times right before my annual motor vehicle inspections, so my ol’ Ford Ranger would pass the smog check.

It always passed the smog check, so I guess it worked. It was either that, or the fervent prayer.

Haven’t actually torn anything down and measured deposits though.

[steve86]

Has an excellent reputation among two-stroke outboard mechanics. Certainly has some strong solvents in it.

[John O]

Widely used in the boating community. Excellent stuff. I use it in my two stroke. Works great

[PeaceBeWithYou]

SeaFoam 60 years and still going. Must work, or it is the biggest scam ever.

[MeneMeneTekelUpharsin]

Excellent product. Don’t overuse it. It will eat seals and gaskets if overused. A lot of fuel cleaners marketed under different names are naptha or similar compounds. Most are pretty much the same chemicals.

[eastforker]

B12Chemtool by Berrymans works much better.

[smokingfrog]

Works great for cleaning your guns.

[rsobin]

I have a Kohler v motor that was idling very poorly. Instead of going into the carb ,I tried it for 3 tanks and it smoothed out nicely.

[Alaska Wolf]

Seafoam Engine Treatment

Fine product. I've used it for years in gas and diesel engines. Follow the directions.

[BigDaddyTX]

Yes, used it on a 2003 Nissan XTerra throwing a knock sensor and catalytic converter code. It would throw the codes shortly after clearing them with IBD2 app every time. After using a can, the codes just came after about 4 months. Not a long term solution.

[Yogafist]

I used it in my motorcycle at the recommendation of a friend that races. Honestly don’t know if it did anything.

[TheMom]

I think we might need some of this stuff.

[JABit]

I've used SeaFoam for many years to keep my 1990 Goldwing motorcycle running well. Mix with gas per directions about every third tank of gas. Purrs like a kitten.

[CrazyIvan]

It works very well without being as harsh as some products. I have used it in older motors like my ‘72 Honda 750. I use Berryman Chemtool for modern injected motors.

[fso301]

A general note of caution about cleaning engines. You can ruin an engine by cleaning it if a piece of gunk falls free and clogs an oil port, or enough pieces of gunk fall free that the screen in the oil pan area clogs.

I never had it happen to me but I have been cautioned by experienced mechanics not to clean varnish and gunk from the engines of high mileage vehicles because the gunk can actually help keep worn engine parts more or less in place.

If you are wanting to clean varnish and gunk from rockers, etc, you can add 1/2 pint of Seafoam to the oil (5 quarts), drive 100 miles and change the oil. Note the color of the oil on the dipstick when you first add the Seafoam and how much darker it is 100 miles later when you drain the oil.

From everything I've read, don't drive the vehicle more than 100 miles with 1/2 pint of Seafoam in 5 quarts of oil.

[eeriegeno]

I used it and it krenzled my ferndocks......

[Thorliveshere]

I use it in my old VW Bug to keep the carb clean. Works really well, especially after the last carb went bad from build-up. Just dump a whole can into the gas tank and she runs like a charm.