Originally Posted by aklim
Has any of them got quantitative tests to back up what they claim or is it just someone having a placebo effect feeling? How much sludge is there really in a well maintained engine? I don't know about the past but in the last 20 years, none of my cars have ever had any sludge build up under the valve covers
There are many threads at bob is the oil guy on both of these products and yes there are before and after pictures taken
with the valve covers off to see whether or not the products did anything.
I've read the threads and seen the before and after pictures so unless every poster in those many threads photoshopped their valvetrain I am going to chalk it up to the stuff actually works.
As for my own experiences with seafoam I put it in my old lady's Chrysler mini-van with the 3 liter(known sludger) engine. Thru the valve cover I could see baked on oil so I went and grabbed my Milwaukee inspection tool(it's got a camera and light meant for looking into wall cavities) and the head had obvious sludge.
So I grabbed 2 gallons of pyb,and 2 cans of seafoam from the part source. I changed the oil and ran 2 consecutive 2000 mile oil change intervals,adding half a can to each change.
By the end of the second oil change the cam was now visible and instead of being very dark brown I could see shiny metal.
After inspecting with my camera I saw that the seafoam had cleaned the entire top of the head almost spotless.
So,sir,I can tell you without a shadow of doubt that seafoam will clean sludge from an engine.
I have since put about 40000 miles on that van and it runs like a champ. It even got rid of a tick the motor had developed.
My mustang wasn't idling properly so after starting a thread a member suggested seafoaming it so I seafoamed the vacuum lines and the idle was consistent again,instead of
surging. I thought it was some sensor but apparently it was a slightly clogged vacuum line.
The mustang and the surging was a problem for about 2 months before treatment.
I also had a 96 dodge with a 5.2 liter. That truck was poorly maintained to say the least. You could stick you finger in the oil fill hole and black muck was present. That truck took 3 seafoam treatments before the muck was cleaned out(to the touch anyways)
So. My conclusion to whether or not seafoam works is that it works,because I have used it and seen for myself that it does.
Answer your question?