Valvoline ZEREX G-40 antifreeze coolant is premium automotive engine coolant developed by BASF AG and Valvoline. The patent-pending hybrid carboxylate formulation has an extended service life. It incorporates state-of-the-art organic acid technology in an ethylene glycol base for protection of all cooling system service life. It incorporates state-of-the-art organic acid technology in an ethylene glycol base for protection of all cooling system metals including aluminum.
- Reliable
- Professional
- High performance



















Amazon Customer –
Works great and I like the color but it’s super bitter. Back in my day antifreeze was sweet, the ol’ green candy. The main ingredients in this is the same but they added something super bitter to it that totally ruins the flavor.
Patrick Downey –
Easy to use. Nice blue color.
TechnoDrive –
This used to come in blue, but now it’s toxic green. I had some concerns about mixing this with my blue original coolant, but presumably the formula is the same, just a different color.
Robert M –
Blue coolant for older MB vehicles.
Corey –
Returned for 50/50
Ventura –
Great stuff, 2009 and 2014 MBZ e350 W211 & W212 Retrofit from pink, this is the New Stuff !!!
John Engel –
If you were looking for BMW, coolant look no further, this will do the job