Non-Porsche anti freeze/coolant

[Geof3]

Just to keep it consistent with NO question, Porsche blood for me. Learned this lesson the hard way in my Jeep...

[Doug427]

I unfortunately have oil in the coolant, likely (I hope) due to a faulty oil cooler or o-ring. It's be flushed super thoroughly, so no real chance of contamination with the new coolant. It just irks me the ridiculous price that Porsche charges for simple coolant. Simple DexCool, if it works, is inexpensive and available. I really can't see any reason it won't be just fine. I also noticed that in his water pump replacement how-to (or maybe it was his cooling system flush how-to writeup), Pedro, who has forgotten more about Porsche's than I will likely ever know, used plain 'ol green Prestone. Thanks to all of you for the answers.

[SC-986]

Years ago I worked in a GM service lane and saw quite a few vehicles come in where the Dex-Cool gelled up and created all kind of cooling system issues. Simply anecdotal evidence but unless they've re-formulated the product that would be the last coolant I would consider.

[Boxstard]

Originally Posted by SC-986

Years ago I worked in a GM service lane and saw quite a few vehicles come in where the Dex-Cool gelled up and created all kind of cooling system issues. Simply anecdotal evidence but unless they've re-formulated the product that would be the last coolant I would consider.

This is because Dexcool (aka Deathcool) was originally introduced without proper validation with all components for compatibility, killing elastomeric seals, gaskets, etc.

With above said, it works fine when the entire system is properly designed and validated for. Actually I use it exclusively with my 03 SAAB and no compatibility issues for 175K mikes and counting.

With my 986, I’m sticking with original Porsche coolant. Pricey but I did complete drain and refill shortly after my purchase 12K miles ago and I do not plan on changing it for at least 5 years so no big deal.

[986bsdriver]

I didnt hit up the dealership. I just bought stuff that was for Porsche, vw, Audi and a few other euro makes. The brand I got also makes stuff specific to Japanese and North American cars and list brand compatibility

[Doug427]

Back when I had my Bimmer I used to use the gold colored Zerex G-05. Maybe I'm better trying that?

[Brian in Tucson]

Originally Posted by SC-986

Years ago I worked in a GM service lane and saw quite a few vehicles come in where the Dex-Cool gelled up and created all kind of cooling system issues. Simply anecdotal evidence but unless they've re-formulated the product that would be the last coolant I would consider.

Maybe customers were topping off with the green stuff (silicates precipitating.) Plus, I suggest that no formulations are static, things do change. Dexx is a standard (I believe by GM) and different brands may be and probably are slightly different formulations.:dance: