[s-cars] G12 coolant

[Thomas R Green]

<www.motor.com> is an industry trade magazine.  There are always  
coolant articles
in the May and August issues.  Good reading for those who just have to  
know.  I ask
that you just read this stuff in the bathroom and then keep it to  
yourself.  The rest of us
can live happily by just keeping some top off coolant supply handy.  I  
like to have it
mixed 50/50 ready for use.

JC, Given the nature of the work on the fan sensor, coolant is one of  
those issues to cover
with the shop while you are holding the tech's shirt collar.  I  
suppose you could put
an aviation style stainless wire lock on the cap-not the copper shear  
wire, if you are
going to insist on dropping the car off with places with suspect  
talent and run off to
China.

Tom

On Sunday July 11 2010 at 6:59PMSteve Marinello"  
<smarinello at entouch.net> wrote

>
> I read through the threads re. Dexcool and it appears that it is not  
> exactly
> true that it is the same, although some parts guy in NJ assured  
> someone it
> was.  Interesting thread on a Mercedes list, too.  Apparently G12 is
> actually Valvoline Zerex G30.  I think it boils down to you are  
> probably
> fine to use a number of different ones, but not to mix them unless  
> they are
> the same formula.  On the other hand, the newer purple G12 is  
> supposed to be
> perfectly compatible with the pink.  SO, I'll probably just add  
> filtered
> water (should be okay, even if it's not distilled, Wylie) to just  
> above MIN
> and have them pick up some high priced G12 at the VW dealer in T-town.
>
> By the way, while looking around, the cheapest price I found was at
> carpartsdiscount.com.  Meyle G12 for $11.05 for 1.5L.  Pentosin G12 is
> $16.25.
>
> It appears that VW and many Japanese/Asian vehicles use an Organic  
> Acid
> Technology (OAT) which is not compatible with the old blue-green  
> Inorganic
> Acid Tech (IAT), or the Hybrid OAT (HOAT) used by Ford, Merecedes and
> Chrysler. Dex-Cool is a TM of GM, and in the currently used Zerex G-05
> formulation, is HOAT.  Zerex Extreme Life is the OAT product that is  
> said to
> be approved by VW on the Zerex info page, although the VW spec is not
> listed.
>
> Problem is, can't find it anywhere...
>
> Steve