I wanted to update you all about the latest results of my z-max experience. My car is smoking again, my oil consumption is still bad and my fuel economy has gone back to what it was before. I have only driven like a thousand miles since adding this crap. Z-max will not restore old engines, like it states in the commercial. This stuff is not a miracle drug for old cars. It is not like "pouring a new engine into your car." I swear by bardahl's no smoke!