Quote:
Originally Posted by AKnowles
Jeff, are you saying this is still an issue? From what I could find online in regard to this issue Preston stated their coolant could be mixed with any brand. Peak, and a few others followed similar bends and the issue was really with high concentrations of silicates precipitating out, but modern coolants are mostly low in silicates at this point.
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There are many compatible coolants out there, but the problem still pops up from time to time, and not just in Porsche's. A lot of people use off brand coolants to save money and a lot of shops use them to increase their margins. At my shop, we operate with very simple rules when it comes to coolants: If we don't know the car or its history, we only add distilled water unless we are doing a total system dump. And we only use Porsche's OEM coolant, which is actually a very good product all by itself. Someone wants to go the cheap route, we suggest they go somewhere else.
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