I always drain into a light colored pan, and I've seen absolutely none of the scale or sludge that Dexcool is famous for.ĭarn, I LIKED using this stuff, because I used to have to change antifreeze every 2 years, using the 'standard' Peak or Prestone formulation. The strange thing is, I've been using it in my two vehicles long enough to do 3 changes with it, and it has come out, when I drain it after 5 years, as clean as when I put it in. Is that what the more informed members of this board would conclude, as well? It sounds from reading the fine print, which I have read before, but BEFORE I knew that Dexcool causes so many problems, that this Preston product, which I've always trusted, is the same, or very similar, to the problematic Dexcool. It also says 'Prestone Dexcool Approved coolant has been approved by General Motors to be licensed as a Dexcool product under the GM 6277M application'. Prestone Dex-Cool Concentrated 50/50 Antifreeze/Coolant 1 gal. ![]() The gallon of Prestone 'extended life' is 'recommended and formulated for all vehicles that require Dexcool coolant'. I believe in doing maintenance on the schedule. It has had the Prestone coolant in it since 2007, when the original Toyota 2 year fluid needed to be replaced. Oil changes at 3000 miles (only twice a year) and everything else that's recommended. My other vehicle, a 2005 Vibe (Toyota Matrix twin) with the Toyota 1ZZ-FE engine, only gets about 6K a year, but I do ALL the scheduled maintenance as if it was used under 'rough service', or whatever they call it in the owner's manual. But, I planned to change the coolant, because it's been 5 years. My 88 Toyota Celica is licensed as a collector car, and only gets about 1 to 2K a year. I wouldn't trust ANYTHING to last 150,000 miles in a car. I was KIDDING about the sulfuric acid was referring to the way Dexcool eats seals, gaskets, radiators, heater cores and water pumps. So my question is: am I safe from the many problems caused by Dexcool, using the Prestone 'Dexcool approved' 5 year coolant. It's old enough now that if I needed some cooling system parts, they could be difficult to find.Īnd, it's due to have the coolant changed this summer. One of them is my cherry 1988 Toyota Celica. I have had no problems, so far, using it, but if it's prone to the same soft of trouble that has been well documented with Dexcool, I don't want to put it in either of my vehicles again! My question: is the Prestone the same formulation, or a similar formulation as Dexcool? I have been using Prestone's 'Extended Life' coolant, which is 'Dexcool approved'. I had no idea that GM was putting sulfuric acid to their coolant! The discussion led to a long article about the many problems associated with Dexcool, and the class action lawsuit: Prestone DEX-COOL antifreeze+coolant - Ready To Use (50/50 Prediluted) is specially designed to work with All GM vehicles 1995 & newer (GM approved), most. ![]() I was reading about a fellow who was having trouble with a GM car's cooling system.
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