love it! using it for years on all sorts of projects. The liquid and the spray version are fantastic. The GM 3800 crowd were i came from really uses this stuff like "duct tape" fixes anything.
Ive used it for everything from freeing seized RC motors, to regular fuel treatment for my families vehicles.
I also treated my LGT through the BPV line sucking it in slowly at approx 2k rpm. I find it best to pour the seafoam into a wide shallow tupper-ware so that i can dip the hose into it and meter exactly how much i suck up throughout the treatment.