So what is the deal with seafoam? I see and hear of a lot of people using it. I have been thinking about trying it but am unsure. First off how exactly do you use it in the vac. lines. And what does it do. And how about in the oil. Are the benefits noticeable? How does it perform afterwards. Does it restore lost power? Does it clean intake and exhaust valves? Does it clean the S/C rotors? Why does it smoke so bad. Is that through the vac. lines or the oil? Do I have to change the oil after using it?