Is anodized aluminum that bad when mixed with copper?

[Fairydust]

I believe G11 doesn't have anti corrosion from what I've researched. It's G12 that does. Zerex at 2-3% or G12 is what you want for mixed metals.

You might find this link helpful. G11 is HOAT, G12 (+) is OAT.

[masaville]

Nice link,

I see what "OAT" is as described, but not what "HOAT" is. Am I missing something, very intersting none the less.

thanks,

andyc

From what I've just read in automative threads, G12 is superior to 11 in thermal heat transfer, anti-corrosion, etc. and was designed for aluminum engines. So, based on the above you could technically use G11 or G12, but with G12 you won't run into any issues with silicates (maybe not in G11 either).

So....should I keep this G11 I have for my copper/anod. aluminum loop or run back and get some G12???

-----------------------------------
Unlike the previous coolant, this newly developed product permits a
cooling system fill that lasts the service life of the engine and
was designed with all-aluminum engines in mind.

Advantages over previous coolant:
Improved corrosion protection
Improve thermal stability
Improved heat transfer/control
Improved hard water tolerance
Improved environmental protection
CAUTION!G 012 A8D A1 must NEVER be mixed with any other coolant.
Engine damage will result !

Don't mix G11 and G12 heh.


Here's a real interesting thread about G11 and G12.

http://www.gti-vr6.net/wiki/index.ph...ine_coolant%3F

I especially like the part about lifetime coolant with a 2 yr shelf life. lol

From the sounds of it, both of them are just as good.