The blue is also for alloy-based engines, but with a different pH level, and is equivalent to the G-11 rating.
The pink and red are specifically designed for alloy engines and both meet the required G-12 coolant specification. Most of these are available under the brand name Pentosin in 1.5-liter bottles. Volkswagen, Audi and other European vehicles use antifreeze that can be blue, pink or red in color. ECD can be attributed as the cause of many premature coolant system failures. This electrical charge degrades both rubber and metal parts in the cooling system from the inside out. ECD is the process by which the motion of coolant and water through your engine creates an electrical charge similar to a galvanic battery. The use of OAT and HOAT coolants can extend the life of rubber coolant hoses, because they conduct less electrochemical degradation or ECD than the conventional green antifreeze. Normally, HOAT coolants are specified for vehicles newer than 2002, specifically Mercedes, Volvo, Ford, VW, Audi, Chrysler, BMW and Saab. Hybrid antifreeze has added silicates for aluminum protection and is advertised as having a five-year change interval. Manufacturers often refer to this antifreeze as "global" and will indicate on the bottle that it meets or exceeds the specification "G-05" for most European cars and G-11 or G-12 for Volkswagen and Audi. One way to know for sure if you are getting HOAT will be by the packaging. This coolant is usually dyed yellow but comes in other colors like green, pink, blue, red and orange, which leads to a lot of confusion. OAT coolants are currently readily available from most auto parts stores. Manufacturers are now recommending your OAT coolant be changed every five years. In addition to its use in 1996 model year and newer GM cars and trucks, OAT is also used in 1996 to 2001 Audi, Land Rover, Nissan, Mazda, Toyota, Honda, Kia, Jaguar, Saab and Porsche. OAT, when spilled or lost due to a boil-over, is much less harmful to the environment. It is made from a propylene glycol base, which makes it less poisonous than conventional IAT for children and pets. Usually (but not always) dyed orange or yellow so you could tell the difference between OAT and IAT, this coolant has similar corrosion protection to the green stuff however, it is designed to be slower acting, hence the extended-life moniker. But because of the additives in the Dex-Cool orange antifreeze, you do not want to substitute the old reliable green coolant. GM introduced Dex-Cool in 1995 as an "extended life" coolant, though most GM car owners and repair shops are finding that Dex-Cool is good for only about three to five years before it needs to be replaced. Chrysler used green IAT fluid until 2001, as did Ford (with the exception of some 1999 models that used OAT blue coolant which must be purchased from Ford).Ĭommonly referred in GM vehicles by the brand name, Dex-Cool or to other manufacturers as propylene glycol. IAT coolant was used in GM vehicles until 1994. Manufacturers recommended that you change the green IAT antifreeze every 36,000 miles or three years. Ethylene glycol is its base chemical, and there are silicate and phosphate additives that make it compatible with copper, brass, cast-iron and aluminum cooling system components. And if I do end up ruining anything, I'll have nothing to blame but my imcompitence.This is the common green stuff original equipment manufacturers have used for over 70 years. But, I'm comfident that as long as I follow the recommended flush intervals that I will be fine. These are the same people that run 5,000 - 7,000 miles on conventional 5w30 oil before they come and get it changed. The only cars that end up looking like that are the ones that the customers don't give a damn about their car and don't do any recommened maintinence. ive seen them with regular dealer ship scheduled services, and 60k in, there are signs of the build up.We have trucks that come in with 150+ thousand miles that have had schedualed cooling system flushes and I have never seen that goo in any well maintained vehicle. was excessive and nasty to make a point and be helpful. maybe at 200k+ miles and 12+ years with the green, but those are few and in-between.Īgreed, cooling system was neglected in the pic i showed. So? whats your point? have you ever seen conventional green do this? honda blue? audi pink? i havent.
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