i did the seafoam yesterday...all i can say is WOW!!!!!after all the praise i read about,i still figured it "might" help a little...boy was i ever surprised...it smoked quite a bit(guess i had alot of carbon built up)man but it felt like a whole new car the engine even sounded better,and pulls alot harder,and runs alot smoother...i would highly reccomend trying it to anyone...