My friends have been singing the praises of using that seafoam stuff EVERYWHERE in their cars, and that it cleans so well it can turn oil black in a few hundred miles. Whatever. I figured it's worth 9 bucks a can to try it out, but something occurred to me. I have a 2006 WRX with stock turbo, is there an oil line running through it? Because I'm pretty sure the gunk would get caught up there if anywhere. Does anyone have any experience with using this stuff, or cleaning additives like it?