Quote:
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Originally Posted by Travis
Quote from MNBoxster:
Porsche claims their coolant is Lifetime, but don't believe it. It is simply a silicate and phosphate free Glycol based coolant. This s/b changed every 5 years/150k mi. (whichever comes 1st) in order to provide maximum corrosion protection. It is the organic carboxylates which breakdown after this interval.
Instead of buying the super-expensive Porsche Coolant, Zerex Extreme Life 5/150, Texaco Extended Life, Shell Rotella® ELC Extended Life Coolant, UNI-GARD
5/150, Mercury Extended Life Coolant Anti-Freeze, all meet or exceed Porsche Coolant requirements and are much cheaper. Use of any other type coolant is not compatible with the system and can form a gel-like substance if mixed with the proper coolant which can then obstruct flow, create hotspots, etc. Hope this helps...
Happy Motoring!... Jim'99
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Hi,
That's right - Porsche does state that their Coolant is
Lifetime, but they fail to define what
Lifetime is, well it's 5yr./150k mi., which to them (for marketing purposes) is
Lifetime. But, Porsche doesn't produce their own Coolant, they re-label someone elses,
Pentosin I believe.
There is currently no available Coolant, Consumer or Industrial, anywhere, at any price, which is chemically stable for a
lifetime . If there were, every Car Mag and Enthusiast Forum would be touting it and the Mfr. would make a fortune.
Also, over time, metalic oxides, in form of scale, and bits of deteriorated hose, etc. will accumulate in the system, reducing it's efficiency. It's a good idea to flush the system regardless of the stability of the Coolant to rid the system of these particulates. Hope this helps...
Happy Motoring!... Jim'99