![]() ![]() OAT is different from IAT as it does not include phosphate corrosion inhibitors or silicates to safeguard your car. IAT coolants are still used in older cars made before the mid-1990s.Īn OAT coolant comes in a couple of different dyed colors ranging from dark green to orange. You should flush out IAT coolants from your car’s system once every couple of years or 30,000 miles. It contains phosphate corrosion inhibitors and silicates that safeguard the metal parts in your cooling system. It is a clear coolant that is dyed green so consumers can identify what it is. Used from the 1920’s to the late 1990’s, IAT coolant is used most often in United States-manufactured cars. Here are some tips for choosing the right coolant, and some coolant reviews to help you find the right coolant/antifreeze for you.įree of nitrites, silicates, borates, and amines, this antifreeze is the best general-purpose coolant at a reasonable price. When you are purchasing coolant for your car, it important to consider how often you flush out the coolant, what types of additives you like in your formula, and what will help you protect the metal in your cooling system while stopping corrosion. There are actually three different types to choose from, and they are each created in different ways. It won’t tell you if the coolant is still protective against corrosion though.Buying the right coolant / antifreeze for your car can be trickier than you think. A tool called a ‘coolant hydrometer’ can be used to check the specific gravity of the coolant. It’s worth noting though, that even though the liquid may still show as ‘full’ in your tank, the active properties of the chemical composition may not be working anymore (ie. Some vehicles require it every 2 years whilst others can come with a ‘lifetime’ blend of coolant. Check the owners manual for your vehicle of with your service dept. This again depends on your specific vehicle’s manufacturer recommendation. Tap water or well water is not recommended due to the minerals in the water. For temperatures below that, up to 70% coolant concentrate can be used. From concentrate, most of the time a 50 percent coolant and 50 percent distilled or de-ionized water dilution is recommended.This will protect the system from freezing to about -34 F. Which could then lead to an expensive doctors bill. Check the owners manual.įirst, check to make sure the solution of coolant/antifreeze you buy is not already pre-diluted. Mixing the wrong types could cause radiator and cooling system damage (which could lead to engine/waterpump damage) and a repair bill that’ll make you pass out on the floor. Unless you’re an expert on the exact chemical composition and reactions of the various types, keep it simple and stick with what the manufacturer recommends. For example, Toyota has green and red, but it depends on the year and model of the vehicle as to which kind is needed. Various aftermarket companies and vehicle manufacturers use different colors. You can also check with your (manufacturer) dealership parts department. Check in your owners manual to see exactly which type of coolant to add to your vehicle. However just because it’s the same color doesn’t necessarily mean it’s the same type. Typically orange or yellow.Īs a quick guide, if your topping up the coolant levels, use the same color as is in the vehicle already. This has silicates and has an extended life lasting up to 5 years. Hybrid Organic Acid Technology (HOAT)- A mix of the above two types of coolant. ![]() ![]() Provides high-temperature protection for aluminum. Organic Acid Technology (OAG)- Found in most newer cars, does not contain silicates or phosphates but has azoles and neutralized organic acids (corrosion inhibitors).Lasts around 2 years. Usually bright green. Inorganic Acid Technology (IAG)-Typically used in older cars up until the mid-90s in the U.S, contains phosphates (corrosion inhibitors) and silicates.Coolant colors yellow and red 3 main types of coolant ![]()
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