Is Valvolineâ„¢ ZEREXâ„¢ G-05â„¢ Antifreeze / Coolant compatabile with the MercedW220?

[GON]

Is Valvoline Zerex G-05 ok for use in the S class 2000-2006 Mercedes W220s? Valvoline website indicates it is but, I have not found any user testimonies. If it is ok, can it be mixed with the blue (pentosin) from the factory, or does it require a flush?

ZEREXâ„¢ G-05â„¢ is the automaker approved original chemistry used in newer Ford, Chrysler and Mercedes-Benz automotive and diesel engines. Its Hybrid Organic Acid Technology (HOAT) chemistry combines the best of conventional and organic acid-based chemistry to provide the ultimate protection against rust and corrosion. ZEREX G-05 antifreeze/coolant uses the highest quality virgin ethylene glycol for freeze and boilover protection and a hybrid organic acid corrosion inhibitor package to protect your engines from liner pitting and corrosion.

 

[BMWTurboDzl]

You're fine using G-05.


Here's a good link. Just select your coolant spec if you want to get into the weeds with this. Spec 325.0 / 326.0 Pre- 5/2014 OR 325.6/326.6.

https://bevo.mercedes-benz.com/bevolisten/bevo-sheets-sort1.html#close

 

[GON]

Originally Posted by BMWTurboDzl
You're fine using G-05.


Here's a good link. Just select your coolant spec if you want to get into the weeds with this. Spec 325.0 / 326.0 Pre- 5/2014 OR 325.6/326.6.

https://bevo.mercedes-benz.com/bevolisten/bevo-sheets-sort1.html#close

Thanks!

 

[nthach]

G-05 is totally fine with your W220, Mercedes is back specing G-48 for all their cars now.

 

[Building3]

What exactly is G-48 coolant? Is it OAT or a Dex-Cool or something else. Are G-05 and G-48 compatible? Thanks.

 

[Nyogtha]

Here's Zerex G48 available through NAPA.

Pre-diluted

https://www.napaonline.com/en/p/ZRX859537

Concentrate

https://www.napaonline.com/en/p/ZRX861583

Info from Valvoline that produces Zerex coolants.

https://www.valvoline.com/our-products/heavy-duty/zerex-g-48

 

[Dino01]

Even though it's back speced in my 2002 CLK430 to use G48, I'm still running G-05 in mine and draining and filling the radiator only every 3 years, always comes out spotless and I've had no cooling issues

 

[nthach]

Originally Posted by Building3
What exactly is G-48 coolant? Is it OAT or a Dex-Cool or something else. Are G-05 and G-48 compatible? Thanks.

G-48 is the new blue-colored Mercedes service coolant, it's also used by BMW/Mini. The main difference is the organic acid, it uses 2-EHA(hexanoic acid) versus G-05's sodium benzoate(benzoic acid). They are compatible.

Mercedes is now using G-40, which is the same as VW's G12++ coolant. I dunno if G-40 and G-48 can be mixed.

 

[FCD]

Mercedes i think has indeed switched to an Si-OAT like VW and Audi which would be G40, i.e VW G12++ or G13

 

[FCD]

Originally Posted by nthach
Originally Posted by Building3
What exactly is G-48 coolant? Is it OAT or a Dex-Cool or something else. Are G-05 and G-48 compatible? Thanks.

G-48 is the new blue-colored Mercedes service coolant, it's also used by BMW/Mini. The main difference is the organic acid, it uses 2-EHA(hexanoic acid) versus G-05's sodium benzoate(benzoic acid). They are compatible.

Mercedes is now using G-40, which is the same as VW's G12++ coolant. I dunno if G-40 and G-48 can be mixed.


Do you have any clue if G40 uses 2-eha?

 

[FCD]

G48 is an OAT with around 250ppm of Silicate, and is usually a bluish green in colour.

G40 is also an OAT but with between 400-500ppm of Silicate and is pink-purple.

 

[Nyogtha]

Valvoline info for Zerex G48 says it's a HOAT. The word "Hybrid" is even spelled out. Check the links I posted earlier. PI sheet from previously posted link shows 250 ppm Si typical.

Zerex G40 is a Si-OAT per Valvoline. No amines per the PI sheet, and 200 ppm Si typical.

https://www.valvoline.com/our-products/heavy-duty/zerex-g-40

FWIW I don't see 2-EHA on the English SDS. I do see Ethanediol listed.

 

[FCD]

Thanks.

I'm finding conflicting answers online on wether VW's G-XX coolants have 2-Eha or not.

Some sources say they do, others say that they do not.

I've Emailed Glysantin to see if they can provide me with an answer.

 

[Nyogtha]

The SDS for Zerex G48 does show sodium 2-ethyl hexanoate as well as ethanediol.

 

[FCD]

Originally Posted by Nyogtha
The SDS for Zerex G48 does show sodium 2-ethyl hexanoate as well as ethanediol.


I can see both G40 and G48 contain Ethanediol and Benzoate, but i can't see 2-Eha mentioned anywhere.

 

[Nyogtha]

The sodium compound is a salt of 2-EHA

https://en.m.wikipedia.org/wiki/2-Ethylhexanoic_acid