hypervish

Does Z-MAX really work? I am thinking of putting it into my 2000 Rx300 AWD. I am hoping it will improve fuel economy i do already put in fuel additivies like lucas injector cleaner and stuff when i change my oil but i am wondering if this Z-MAX stuff actually works.

Lexmex

I'd personally pass on this one. Z-Max is not really an additive in my mind, but more something to deal with the engine internals (and I know better stuff for that, but you won't need it). There was a product I used down in Mexico from Liqui Moly (Lubro Moly in the U.S.) called Ceratech that was outstanding and made the engine run really smooth (in part because yours truly did and still does not run an air filter).

You're doing fine running Lucas.

BTW, what MPG are you getting right now?