Dexcool is still a GLYCOL based coolant.


http://www.valvoline.com/pdf/Zerex_D...l_Bulletin.pdf


Zerex has five different ethylene glycol-based formulas:


"Original" - Uses a low-silicate corrosion additive package
Dexcool - Uses Organic Acid (OAT) corrosion additives
G-05 - Uses Hybrid OAT additives that are low-silicate and phosphate-free
Asian - Uses phosphated HOAT additives that are silicate and nitrate-free
Extended Life (HD truck) - Uses OAT additives and HD corrosion inhibitors


So, back to my original question...if not the Dexcool formula, which is better or the best of the other four?

 

Following this post. I have been running universal long life the past 6 years (flushing every two years) but have been wondering about switching to Fleetguard or the equivalent but wondering about the silicates.

 

Thanks,
Now I am more confused about what to be running in all my vehicles.

If Dexcool is so bad for the Rovers, why is it recommended by the manufacture?

Is there any system it should be ok in, or is it bad stuff in general. My Volvo calls for it as well. I've only used the Green stuff in my Titan and have never had any problems.

I am wondering if I should just start running green stuff in everything.

 

FYI...Fleetgard is owned by Cummins...and their branded coolant is packaged by Ashland Oil/Valvoline (Zerex).

 

Roger that. I took some extra credit product training for the chain store in which I work.

 

As of right now, I'm leaning towards the G-05. Found an aftermarket cross-over chart published by Zerex in 2003, and it shows the Jaguars and Volvos to be switched over to their G-05. And Jag and Land Rover always followed suit...BMWs were always recommended to switch to the G-05.


Unless someone on here can convince me otherwise...

 

There's nothing wrong with Dexcool, you just have to change it out occasionally. Mine had Dexcool in it when I got it 3 years ago. I changed the water pump last year and used Prestone Dexcool for the refill.

 

My understanding is Dexcool is fine...in a perfect world. We own Rovers, so we're aware of imperfections.


Dexcool is silicate-free; silicates act as little "leak seekers" in the system (sodium silicate is also known as "liquid glass"). If you have any air in the system, from little leaks that do not seal themselves, the chemicals in Dexcool will react with the available oxygen, start a corrosive reaction inside the cooling system and propagate additional leaks.

 

see pic in post 5

 

Exactly!!!


So...any opinions out there on the Zerex options???