Coolant and yes I have searched and read
 

Still I did not see any definite conclusions to the OEM Porsche OAT coolant. Is there a substitute OAT that equals the original (and upgraded) Porsche coolant ?

I know Porsche does not manufacture coolant so what are you guys using ??

Porsche coolant

Porsche coolant

And changing/flushing it every 36 months ('97, original water pump and coolant tank)

I use the coolant Porsche uses OEM, but don't buy it from Porsche. ;)

Regards, Markus

VW/Audi G12 (pink) or G12+ (purple).

Pentofrost. Done.

Pedro has a great diy
Flush Coolant System Porsche DIY
and all about OAT & HOAT coolant"
http://www.pedrosgarage.com/Site_5/Coolant_Antifreeze.html
Plenty of OAT choices here:
http://www.oreillyauto.com/site/c/search.oap?keyword=antifreeze

Ravenol or Vaico G13 works as well (that's pretty much all I run in mine... flush once every 3 years)

VW Antifreeze - VW G13 G12 Antifreeze - Pink Purple VW Antifreeze

Man, i debated this thing with myself years ago...I felt like a complete dumbaz considering coolant at $30 a gallon at 90K on the clock.
At the end of the day, the best alternative I found was a Zerex extended life was about $18/gallon.

At the end of the day, I figured that this was not worth it (to me) to second guess the decision to spend an extra $36 on the P-brand. I figured I may never have to do this again (if I sold the car at some point).

Hm, OK - does everybody know what OAT means and why Porsche used it?

So if you are using a different non Porsche, non OAT cooling fluid, make shure you change it frequently at min. every 5 years.

Regards, Markus

Organic acid technology

wikipedia is a good place to start.

Thanks Folks
 

This sums it up better than I have seen it in one place before

OK I'll bite:
@ Markus
1) why did Porsche use O.A.T.?
2) where did you get the equivalent-to-Porsche-brand fluid? Is there a compatible and comparable alternative to purchasing fluid from the dealer?
Thx

Pentosin's PENTOFROST. It's label states it's for VW's, Audi's, and Porsche's.....and all aluminum engines.....

The current coolant Porsche is selling for our cars is not OAT.

As proof, note the word "silicates" appearing on the ingredient list of Porsche's most updated/current coolant...http://986forum.com/forums/uploads02...1487221267.jpg

The part numbers of this particular jug are: 000 043 301 49 on the back, and "G-40-91-EF" on the front:
http://986forum.com/forums/uploads02...1487221295.jpg

Looks like this could be the type (Porsche approval):
G40® | Glysantin®

So it's a silicated-OAT, then (also considered a HOAT).

Per Glysantin, G40 is used from 2010 onward, G30 from 1996-2010, and G48 up through 1995.
http://www.glysantin.de/fileadmin/Files/Downloads/Publications/BASF_Glysantin_Zulassungen_EN.pdf

https://www.walmart.com/ip/Peak-Global-Lifetime-Anti-Freeze-6ct/17201158?wmlspartner=wlpa&selectedSellerId=1122&ad id=22222222227010052247&wmlspartner=wmtlabs&wl0=&w l1=g&wl2=c&wl3=150343663857&wl4=pla-261227233139&wl5=21164&wl6=&wl7=&wl8=&wl9=pla&wl10 =101593696&wl11=online&wl12=17201158&wl13=&veh=sem #about-item

works fine. Don't overcomplicate it, the porsche stuff is nothing special.

Lots of OAT brands to choose from. See Post 7 above.

I'll get it from BASF. See post #16 from Deserion.

It's G30 (OAT) for the 986. Why? Because it's an alloy engine. And because it has a very long change interval (very good long term stability) compared to other fluids.

In general it seems you can also use G40 (Si-OAT). But you have to flush the system completely.

Don't mix silicat free coolant fluid like G30 with silicat containing coolant fluid like G40.

I don't know how the parts in the 986 cooling system react on the silicat. Don't know if Si-OAT is 100% compatible with the 986 coolant system on a long term.

In general silicat reacts with alloy and generates a protective layer. But this layer doesn't last very long. So they developed the OAT coolant fluid. The long term alloy corrosion protection is much better.

This is why i would recommend to use BASF G30 for a 986 car.

The bottle jakeru shows is the newer G40 stuff.

Regards, Markus

Just use Porsche coolant and you don't have to worry about all this BS

Or Flush it and run green on all your cars. Makes it easy and inexpensive.

ChrisFix has a really good video on how to flush cars.

Blablablablablabla…

Typical Forum response.

In 1989 Nissan made the SR20det Alloy engine, cast and turbocharged. It has 27 years of life and its only headgasket failure was caused by lean mixture causing high temperatures. That engine has seen race track temperatures for the last 10 years with 50% prestone 50% de-ionized water.

Our 17 year old porsches are not different. Ok maybe better looking and as good balance. What they don't require is magical coolant. They just require water that doesn't cause galvanic corrosion.

Also what is the point of long life coolant? Thermostats & water pump both fail way before the 5 year mark if the car is actually used and not stored. 5 Gallons of fluids with that 50/50 combo will set you back 40$ and you actually have 6 gallons of that stuff. That way you can give what it really needs! Good oil.

But that is my constructive criticism built from a decade of finding the best way to maintain a car without breaking the bank.

As said blablabla. Too much time wasted. I'm out now. Bye.

These porsche cars actually do!

Quick question; what is the cast AL type of your engine case/heads? the composites used for the gaskets, tank, fittings, hoses, what are their chemical compositions? Do you know?

Take your trusty Porsche Eng's advice when he says you should use, and only use, Porsche approved fluids my friend. (No-No Wallmart weekly specials allowed loll)

Besides... all of the extra profits they make while robbing you with their great TM does in fact back right into R&D. Meaning better cars for our next generations (or silly EV cars, whatever). Support the Brand!!!

Like most maintence related things, instead of basing decision's on purchase price, look at them from a cost of ownership basis.

Are there cheaper alternative coolants? Yes when only looking at the acquisition costs. Even then, some products like some Pentosin versions actually can cost more just to purchase. But you need to account for several other "costs" as well: Purchase cost, how long the coolant lasts in use, and cost of the time to drain and replace the coolant, even if you do it yourself, your time still has a value.

We see a lot of cars, and do a lot of coolant replacements over the life of these cars. Some brands of coolant have "legs", meaning that years after the exchange, they continue to test well. Others, not so much. So if coolant A cost the same, or even slightly more, but is still doing well two or three years after a cheaper coolant B alternative has failed testing and had to be replaced, which one was the better deal from a purely economic perspective? Just a thought..........

You have to replace the POS water pump every few years anyway, so its not like your coolant needs to last until the end of time anyway.

I really hate to say it but Quadcammer has a point. Seems like everything on these cars are "wear" items...

Well if they sold in the USA they had to follow the SAE standard. J814: Engine Coolants - SAE International

Al, they are all corrosion resistant: Aluminum VS. Copper-Brass Radiator: Corrosion Susceptibility
Headgaskets usually steel ring is touching coolant.
Hoses follow a standard. For example a different hose J30R6 for fuel.
Tanks, plastic most likely ABS.
Fittings if they are not steel or cast allow or ABS

Walmart is just a retailer, you could by the same thing at CaCanTire if you want.

All that the OP needs to know is that both fluids are not compatible. They will all provide the protection needed at different costs.

Its all about good-feeding-anything to your car really!

Personally if there would be anything more expansive than the Porsche Pink, I'd just buy the more expansive stuff... given its on the list of approved by P.

Just feels right LOL

Coolant flush, feel fresh; the rest is to wear your newest pair of sport shoes, and go for a proud roadster ride somewhere downtown... where everybody can't see you new shoes, and over-priced coolant.

It just alllllll feels right. Consistent with the brand, you see ;)

(ps: leaving the blah blah blah tech behind!)