So after reading many great reviews about this seafoam stuff everyone seems to be raving about i decided to try it out. I followed the directions from the bottle and what Ive seen on the website and on youtube (seen how to, and how not to). After everything was said and done with I honestly can say i don't really notice anything different about my car. I didn't notice any crazy cloud of exhaust coming from the back after I restarted my car. I dont know if I did anything wrong or if i shouldn't be worried or what? Any one ever use it? maybe I didn't use enough.