| OK, I've read that link twice, and I keep coming back to this:
"Eventually silicates are meant to drop out of the coolant mix. Only at a controlled rate. BUT over time the mixutre of chemicals and impurities and corrosion by products in a cooling system can start to hinder the performance of the cooling system. When silicates begin to drop out too rapidly, they build up and form a gel.
The most common inhibitors, the silicates used for aluminum protection, are used up faster than others. That is why some new cars (all General Motors, Mercury Cougar, VW/Audi and BMW models) have red or orange antifreeze with a new class of inhibitors, called organic acids. Examples of U.S. brands with these organic acids: Havoline Dex-Cool and Prestone Extended Life, both recommended for five years or 150,000 miles."
Soooo... Prestone ExLife would be OK, right? I got kind of lost for a minute, and wanted to make sure there wasn't something I was missing. I'm going to flush it out, and saving $10 a gallon for a two-gallon flushing is a $20 I could make use of.
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