I just seen a comercial for zmax does it really work good is it worth it? it looks like it would be any one have any experice with it? thanks

 

Isn't Z-MAX just for gas engines?

 

Its for gas or diesel.

 

do a search, you will find some interesting info on zmax

 

It's a scam. Z-Max has been sued by the feds for making false claims. Apparently, it's nothing more than colored mineral oil. Kinda sad that Shelby puts his name on it. Some people will do anything for a buck.

 

Yep. What a joke. Heard a lot of horor stories as well.