Which antifreeze for a 200 Quattro Turbo?

Modus · 20-12-20, 03:22 PM

Can it take the red OAT antifreeze? If not, which types of coolant can it take?

Car is a 1987 2.1 turbo model

mikes2 · 20-12-20, 05:18 PM

Definitely not red.

You want either G11 (blue) original type or G13 (purple) latest.

Gaz · 21-12-20, 12:09 AM

What's wrong with using the OAT providing whatever was in their was fully flushed out so no cross contamination?

John. · 21-12-20, 08:02 AM

Quote:

Originally Posted by Gaz

What's wrong with using the OAT providing whatever was in their was fully flushed out so no cross contamination?

The OAT stuff doesn't like yellow metals as far as I'm aware

86audicoupe · 21-12-20, 05:17 PM

I would recommend G11 as this is what was originally used. I have used this in my Coupe GT.

Gaz · 22-12-20, 08:44 PM

Quote:

Originally Posted by John.

The OAT stuff doesn't like yellow metals as far as I'm aware

Ah I see.. which parts of the engine does it effect?

I'm sure I read that the older OAT stuff had issues of some kind with something in engines but the very latest OAT stuff isn't affected with the same problems?

I don't know if this yellow metal issue was the old issue ? Or if that was something different altogether?

mikes2 · 22-12-20, 10:14 PM

Just to pick up on this, I never said for or against OAT.

I specifically said, don't use red

Red is G12 and was only used for a short time when all alloy engines were first fitted to Audis in the mid to late 90s. It wasn't backward compatible with G11.

The latest G13 is backward compatible and can be mixed although a flush is usually recommended.

This gives a decent summary

https://www.ato24.de/en/blog/which-coolant-antifreeze/

John. · 23-12-20, 08:09 AM

Quote:

Originally Posted by Gaz

Ah I see.. which parts of the engine does it effect?

I'm sure I read that the older OAT stuff had issues of some kind with something in engines but the very latest OAT stuff isn't affected with the same problems?

I don't know if this yellow metal issue was the old issue ? Or if that was something different altogether?

Anything with brass or copper but I think you're right, it was an issue when the OAT stuff first came on the market?
I would think the owner's handbook will say use an ethylene glycol based antifreeze and to change it every 2 years, at the time it'd be blue in colour.

20-12-20, 05:18 PM	#2
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Definitely not red. You want either G11 (blue) original type or G13 (purple) latest. __________________ 1991 90 quattro 20v sport 1991 90 quattro

22-12-20, 10:14 PM	#7
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Just to pick up on this, I never said for or against OAT. I specifically said, don't use red Red is G12 and was only used for a short time when all alloy engines were first fitted to Audis in the mid to late 90s. It wasn't backward compatible with G11. The latest G13 is backward compatible and can be mixed although a flush is usually recommended. This gives a decent summary https://www.ato24.de/en/blog/which-coolant-antifreeze/ __________________ 1991 90 quattro 20v sport 1991 90 quattro

21-12-20, 12:09 AM	#3
Gaz Senior Member Join Date: Jul 2007 Location: Five Cylinder heaven Posts: 1,494	What's wrong with using the OAT providing whatever was in their was fully flushed out so no cross contamination?

21-12-20, 05:17 PM	#5
86audicoupe Classic Audi Pervert! Classic Audi Club Member Join Date: Dec 2007 Location: Dorset Posts: 2,182	I would recommend G11 as this is what was originally used. I have used this in my Coupe GT.