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.

SwallownAmazon · 23-12-20, 12:23 PM

Agree with MikeS2 and John - use blue ethylene glycol based antifreeze. Why complicate the issue?
In any cae, even reverse flushing doesn't get all traces of old stuff out and if there is a reaction because of incompatibilty........

Mellis46 · 23-12-20, 06:30 PM

Personally I’d go the other way, if you use G13 you can leave it alone and just replace when you do the timing belt / water pump every 6 years as I have. My 90 will testify to zero issues using it over an extended period.

Creates work for yourself having to change the blue stuff every couple of years, it doesnt last anywhere near as long?

Give it a good flush anyway. use the genuine stuff, lets you kick the tyres of the new ones at the dealers while leaving a proper car in the carpark

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

23-12-20, 06:30 PM	#10
Mellis46 Aero Advocate Classic Audi Club Member Join Date: Aug 2014 Location: Lancashire Posts: 1,448	Personally I’d go the other way, if you use G13 you can leave it alone and just replace when you do the timing belt / water pump every 6 years as I have. My 90 will testify to zero issues using it over an extended period. Creates work for yourself having to change the blue stuff every couple of years, it doesnt last anywhere near as long? Give it a good flush anyway. use the genuine stuff, lets you kick the tyres of the new ones at the dealers while leaving a proper car in the carpark __________________ -1987 90 2.2E / Sapphire Blue (Rest in Pieces) -1989 90 quattro with Sport Equipment / Satin Black -1997 A4 Avant quattro TDI 110 / Tropical Green (Sold)

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.

23-12-20, 12:23 PM	#9
SwallownAmazon Grown up member Classic Audi Club Member Join Date: Jun 2017 Location: Tonbridge, Kent Posts: 511	Agree with MikeS2 and John - use blue ethylene glycol based antifreeze. Why complicate the issue? In any cae, even reverse flushing doesn't get all traces of old stuff out and if there is a reaction because of incompatibilty........