Anyone ever try that Z Max stuff? Supposed to break carbon up and disolve it. Or is it just another snake oil like Slick 50, Motor Up, Duralube, etc.

 

biggest waste of money. I put in a engine that had 5000 miles on it and it made it louder, the engine ticked and you could the pistons slap from skirt chatter.


Total waste to me... I even had a membership and they would send me an entire kit every 6 months. It made for nice gifts....

 

Read this:

http://www.oldengine.org/unfaq/additive.htm