[wingers]

What type of antifreeze do we use,

Is it Oat, Hoat, Noat, or the old Ethylene Glyco etc.

It seems use the wrong type in some engines and disaster is around the corner.

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[Darryl]

Do a search...but the short answer is most (including myself) like the Prestone Extended Life Orange stuff. Phosphate free is the key for our aluminum pieces and parts, but there is lots of info here on the topic.



- Darryl

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[VGM911]

Isn't this a case where using the Porsche product is a good idea?

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[Dave]

My P-car shop used the Mercedes coolant, presumably phosphate-free as well. I'm not sure there is a Porsche coolant. Perhaps????

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[Steve]

Can anybody tell my why these companies are saying what they are saying about phosphate free antifreeze? Do they really want to hurt our Babies?!?



This is from the Peak web site. http://www.peakantifreeze.com/faq.html



"Why does my vehicle owner’s manual recommend a phosphate free antifreeze?

Some European car manufacturers recommend that phosphate free antifreeze be used in their vehicles. The reason is that the water in Europe has an extremely high mineral content. If you mixed an antifreeze containing phosphates, which are part of the corrosion inhibitor package, with the water they have in Europe, the phosphates in the antifreeze may “drop out” and form deposits in your cooling system that can lead to corrosion. However, this is not a major concern in North America, since our water is lower in mineral content, or softer, than European water.If you are interested in a phosphate-free antifreeze, Old World Industries offers PEAK® Global LifeTime™ Antifreeze and SIERRA®, the Safer Antifreeze. "



This is from the from the Preston web site. http://www.prestone.com/carcare/faq.php



"Q. Does Prestone® Antifreeze/Coolant contain phosphates?

A. Some European automobile manufacturers request that a phosphate-free antifreeze be used in their vehicles. This issue is related to the extremely high mineral content of the water in Europe. If you were to mix an antifreeze that contained phosphates with the type of water they have in Europe, it may produce deposits that can settle in the cooling system and promote corrosion. However, in North America we do not have this type of water problem. Typical North American coolants have contained phosphates (which is part of the corrosion inhibitor package) for many years. Therefore, the question of phosphates is a non-issue here in North America. Prestone® Antifreeze/Coolant is completely safe for use in both foreign and domestic vehicles. For those consumers who would feel more comfortable using a phosphate-free antifreeze, our Prestone® Extended Life 5/150 Antifreeze/Coolant is phosphate, silicate, and borate free. This coolant uses a special chemistry and technology that extends the life of the corrosion inhibitor package so that it lasts for five years or 150,000 miles (whichever comes first), and is safe for all cars and light trucks (old or new). Prestone® Extended Life 5/150 Antifreeze/Coolant has been approved by General Motors under their DEX-COOL® specifications and is compatible with other DEX-COOL® approved coolants. "

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[sasilverbullet]

hehe, what marketing drivel...well here in the Texas hill country we have HARD water! So it IS an issue for us!

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[JWahlsten]

Regardless of what the marketing "drivel" states. You want a coolant that is both phosphate and silicate free. I used to use the blue stuff from Mercedes and/or VW, but have taken to using the Prestone orange stuff. Markus Blaszak is very adamant about this and I respect his opinion on it. I've seen lots of deposits in cooling systems without using these.



Additionally, I use distilled water. I've heard arguments for and against, but would only consider using stuff run through a reverse osmosis filter if not distilled.



We have HARD water in Delaware too...

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[kodomokid]

This has been my question too since I got scared to use the green stuff ever since owning a European car. For my VW and Audi's, I use the specific coolant for their years. The pre '98 cars take G11 Pentosin blue coolant and my Passat is G12 Pentosin pink coolant. Since Porsche is somewhat related to this family, I've been thinking of switching the 968 to G11 blue coolant. It has the green stuff in it right now. Who knows what's in the green stuff or which one it is. My take on it is if that is what the factory uses, might as well keep using it. Going to flush the system very soon and replace it with the blue stuff.

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[JWahlsten]

Agreed. Make sure you don't use tap water...



All you guys with your Corrados are killing me. I had a G60 car with a stage 3 kit in it for about 8 years and 80k+ miles. I almost bought another, but ended up with the 968 instead. Ahhh too bad.

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[kodomokid]

[quote name='JWahlsten' post='34958' date='May 2 2007, 06:17 PM']Agreed. Make sure you don't use tap water...



All you guys with your Corrados are killing me. I had a G60 car with a stage 3 kit in it for about 8 years and 80k+ miles. I almost bought another, but ended up with the 968 instead. Ahhh too bad.[/quote]





I love Corrado's. I won't give mine up. I kinda want a G60 still for the sheer pleasure of hooking up a Lyshom charger to it and let it scream down the road. But my SLC is very civilized and I do like that.



Oh yeah, the previous owner switched it to G12 pink coolant. VW said that it would be even better for the aluminum block. So maybe I will see about putting the pink stuff in the 968.



I thought that you shouldn't use distilled water since there is a chance that it could become more reactive with the metal since there are no buffer minerals to make the water more neutral? Or am I just smokin?

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[JWahlsten]

[quote name='kodomokid' post='35000' date='May 3 2007, 06:54 PM']I thought that you shouldn't use distilled water since there is a chance that it could become more reactive with the metal since there are no buffer minerals to make the water more neutral? Or am I just smokin?[/quote]



This is the risk of using distilled water. I haven't had any problems with it, but maybe water filtered by reverse osmosis would be better. I know a lot of racers use distilled water and water wetter. They would be able to give more info than I.

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[flash]

filtered water (like from the store) should be fine - it just needs to be mineral free



the coolant needs to be phosphate free - porsche is VERY specific about this - when i called them about this specific issue, i was told that they will even void the warranty if the wrong coolant is used - they have had this policy for years

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