What do you guys think of seafoam?

[ryan34]

Just what the title says, and also how do you use it?

[CDJr]

I used to use it to clean out the cylinders etc by feeding it straight into vacuum line and it did its job. Probably not a good idea to do often though I still occasionally pour a can into the fuel.

[Craig 94 TA GT]

I just used it the other day before my smog retest. It's pretty good stuff, especially through the brake booster vacuum line. Just make sure to unplug your MAF when you remove that line - so the car won't die due to the vacuum leak. The only ill side-effect is, if you have too much carbon build-up, you might risk getting your O2s full of junk and/or coated from the Seafoam breaking all that junk up.