It applies to ...

I'm swapping out my thermostat, and while I am going to save the coolant (it was just changed a few years ago), I could probably use another quart. Just wondering if someone has less than a full gallon laying around they would be willing to part with - I will pay fair price for it.

steve DOT wilwerding AT gmail DOT com

... without any ill effects.
You can also mix brands, including Porsche as long as the coolant is phosphate and silicate free.
Most of the high quality coolants of today are compatible as most car engines are now aluminum block, just like Porsches.
Happy Boxstering,
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

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Racecar spelled backwards is Racecar

"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"

"If you wait, all that happens is that you get older"... Mario Andretti

"Being second is to be the first of the ones who lose" ... Ayrton Senna

Pedro,
Do you know if this applies to the 981 as well?

... all Porsches.
The reason why you couldn't mix coolants in the past was that most engine blocks back in the day were made of iron.
In order to protect the iron they mixed in phosphates, silicates, etc.
Then, Porsche came out with aluminum blocks which does not like phosphate or silicate, so they had to develop their own coolant formulation.
If you mixed the coolant containing phosphate and silicate with the one that didn't have those additives, the mixture would gel and clog up the system.
Eventually other additives were used and more and more manufacturers turned to aluminum-block engines as well so now the norm is to have phosphate and silicate free coolants.
It is difficult to find a coolant with phosphate and or silicate now a days.
So now you can mix coolants: Porsche with Prestone or Zerex or Peak or ....
The color of the coolant is not an indicator of the additives.
Check out this article I wrote some time ago regarding coolants:

[pedrosgarage.com]

Happy Porscheing,
Pedro

Pedro Bonilla
1998 Boxster 986 - 311,000+ miles: [www.PedrosGarage.com]
PCA National Club Racing Scrutineer - PCA National HPDE Instructor - PCA Technical Committee (Boxster/Cayman)

---

Racecar spelled backwards is Racecar

"Racing is life. Anything before or after is just waiting" ... Steve McQueen as Michael Delaney in "LeMans"

"If you wait, all that happens is that you get older"... Mario Andretti

"Being second is to be the first of the ones who lose" ... Ayrton Senna

I mixed the blue and pink stuff in my mom's audi 10 years ago. It became an awful, ugly, "you have oil in your coolent" brown.

And worked just fine, still does.

Grant

Grant

gee-lenahan-at-gee-mail-dot-com