Substitute for Porsche Antifreeze?

[xcbxer]

OAT (Organic Acid Technology) long life/extended life coolants were originally orange. Later versions were green or yellow to indicate their semi-compatibility with green EG (ethylene glycol).

There's been a lot of bad press and law suits surrounding GM's DEX-COOL. GM engineers blamed, amongst other things, trapped air pockets left behind after a system flush.

Many OEM car brands now proliferate. Maybe that's nothing more than liquid badge engineering.

I miss the plain old green EG - just had to change it every 2 years. Meantime, I'll bend over for a $25 jug of Porsche antifreeze.

My 97 manual says the coolant is for the life of the engine. Is anybody flushing on a more regular basis?

[Steve Tinker]

The cost of buying the genuine Porsche coolant vs the (potential) problems that a cheap non conforming fluid can cause is a no brainer!!
Change the coolant every 5 years and sleep easy........
Whats $100 over a few years ????

[SeanZ4]

My 986S has the original green porsche stuff in it. It was a little low so I bought the oem pink porsche stuff, not wanting to take any chances. They (P-dealer) told me they would mix fine because the green stuff was porsche also, just older. Is this true??

sean

[JFP in PA]

Yes. A couple years back, Porsche made a change in the antifreeze to improve corrosion resistance even more, and the color changed from green to pink/orange. The new pink stuff is totally compatible with the older green product for the reasons I mentioned earlier....................

[SeanZ4]

Thanks Jeff!