![]() ![]() One can also use the good old fashioned short-life green stuff and replace it more often. A complaint has been filed against Prestone for misleading advertising in the use of the word "universal". "yellow stuff") instead which is a hybrid organic acid technology product not based on 2-ethyl-hexanoic acid. Use the Zerex G-05 long-life (Ford specification WSS-M97B51-A1, A.K.A. That killed the OAT coolant idea for Ford". Ford also saw similar issues with other gasket materials. Whereas, if you have an orange-colored coolant, you know your car. This also means you will need to replace your coolant more often. Green-colored coolants indicate that your car has a steel and copper material engine. Softening (and the resulting distortion) was reported by Ford, which encountered gasket leakage problems when it tested a DexCool type formula on its V8 engines. As it turns out, knowing more about what color your radiator fluid is can help you understand quite a few things about your car. From the August 2004 issue of Motor magazine: "All DexCool-approved coolants to date use two organic acid rust/corrosion inhibitors, one called sebacate, the other called 2-EHA (which stands for 2-ethyl hexanoic acid).The rust inhibitor 2-EHA poses another issue: It's a plasticizer (softens plastic), so it has been blamed for coolant passage gasket leakage. The Prestone "Long-Life (5yr 150,000mi)" coolant contains sodium 2-ethyl hexanoate according to the bottle, which is probably the salt formed from mixing 2-ethyl-hexanoic acid with sodium hydroxide base. This is an Organic Acid Technology (OAT) coolant. "Do not use Prestone universal in any Taurus. Both of these types are long-life coolants and may. HOAT coolants are often yellow or orange but may also be blue, red or pink. OAT is an extended life coolant that can. OAT is traditionally orange or red, but can also be green, pink, or blue. A third type of coolant utilizes Hybrid Organic Acid Technology that combines the benefits of IAT and OAT into one product. IAT coolant is the typical green coolant. I was doing a cooling system repair on a Taurus today and had to look up which coolant it was supposed to have (apparently "mud" isn't a color) and ran across this on a Taurus forum. This type of coolant uses organic acids to prevent corrosion and is usually orange in color. ![]()
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