Has anyone here tried using this? I just want to discuss it. I've tried 4 out of 5 Seafoam products they offer at this time; the only one I haven't tried yet is Bug B Gone. Read on... Seafoam: Regular This can be put in gas tanks as a fuel additive, crankcases to clear sludge fast (though you may not want to do that depending on the application) and through an air intake slowly to clean piston cylinders. (I've done this and it did make the engine sputter which is normal, and the sputtering stopped shortly after.) I've also used it to clean piston cylinders by pouring it into the cylinder with the spark plug off and letting it sit before flushing it out; this does work pretty well in loosening deposits that are caked on if there's something to loosen. On a weed eater which was hard to start I cleaned the cylinder out with this and added a new spark plug. I'm not sure how much of the effect was from the cleaning and how much was from the new spark plug, but now I can start the thing. It also lowered emissions on a lawnmower by this cylinder cleaning. Seafoam Spray: Same as the above type, just in Aerosol Can form. Seafoam Deep Creep: Comes in a spray can. This is a penetrating lubricant and it holds on to whatever you spray it on. I've used it and it does work, I read some say it works more effectively than P B Blaster though I haven't compared. Seafoam Trans-Tune: For Transmissions, Power Steering systems and Rack + Pinion. I used it in a power steering system which had burnt fluid, removing the old fluid and adding this. I'm not sure how fast it would have cleaned if I just kept adding and removing power steering fluid, but this did clean the whole system. I had to use almost three cans of it, and I don't think the previous owners of the car ever changed the fluid. Seafoam Bug B Gone: For cleaning bugs, bird dirt and mold in showers among other things. This is the one I haven't tried yet.