You might as well get a few rolls of quarters and drop them in the various systems this stuff is supposed to improve. Seriously, would you believe that one product could do all of those wonderful things. Use good gasoline, change your oil frequently and maintain your cooling system. That's the best way to avoid all the problems those informercials tell you that you'll have if you don't use their version of mechanical miracle. Save your money and get an exra oil change..
1987 BMW 325