[V8] coolant

[32vquattro]

Dave, I'm running the g-05 myself. the trick is this, you can run any 
silcate,and phosphate free type antifreeze you want. You just cant mix 
brands (read complete flush first).  Im switching back to oem, but to the 
g12. If your worried about finding some in a pinch, just keep an extra 
gallon in the trunk. I can get the g-12 for $14 a gallon at my local 
dealer( beats the crap out of $10 a ltr at the local parts store for the 
pentosin)
----- Original Message ----- 
From: "d saad" <dsaad at icehouse.net>
To: <v8 at audifans.com>
Sent: Thursday, May 03, 2007 3:01 PM
Subject: [V8] coolant


>
>
> I was using Zerex 5-year orange coolant. I think it is similar to
> "dex-cool".
> The inside of my motor looks fine - no scale or
> buildup or corrosion, and the radiator is also still good, and not plugged
> up at 150K miles. However, I began to wonder why the head gasket failed
> the way it did.
>
> From the Zerex web site, newer Audis do in fact
> take this coolant, but my 1991 calls for the Zerex G-05 "yellow"
> stuff.
> In talking to the people at the radiator shop (who just tested
> my rad), they always revert any car back to the good old green stuff if
> they can - meaning complete flush out if customer lets them do it.
> Same for the trusted VW/Audi shop I talk to.
>
> If I go factory,
> the book says G-11, but it looks like that superceded to G-12 (which seems
> to be very much like dex-cool, and then to G-12+ which seems to be very
> much like Zerex G-05. (and - no - I don't know why the naming scheme seems
> so similar from Zerex (made by Valvoline) and VAG. The G-12 seems to have
> had problems - just like GM is having with its dex-cool. There is a big
> class action lawsuit over that one.
> This G-05 seems to be closely
> related to the old green stuff, but lasts longer.
>
> To complicate
> matters, it seems G11 is superceded with G-48 which seems to be branded
> "Glysantin" and made by - wait for it - Zerex, and the major
> difference is a little more silicate in the G-05.
>
> So - I am
> leaning toward the Zerex G-05 unless you all can talk me down.
> I want
> to avoid the OEM stuff just because I want to be able to get emergency
> coolant anywhere, and mixing the wrong coolants anymore causes big
> problems quickly.
>
> ???
>
> Dave
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
> Have an Audi V8 question?  Check the Audifans Knowledgebase!
> http://www.audifans.com/twiki/bin/view/Audi/V8
> Have a V8 answer? ... Please help others by adding to the KB ... all 
> contributions welcome!