Given the very real danger of adding the wrong type of coolant to the reservoir, it isn’t worth taking the risk unless you’re absolutely sure. For instance if you buy a used car, it’s incredibly difficult to tell what type of coolant is in the system unless you drain and flush the system, and whether or not it’s safe to top up the reservoir with a fluid of the same colour. The fact that drivers can no longer distinguish different types of coolant by colour is a problem. In fact if they’re added into a cooling system together the results can be catastrophic, creating a gelatinous substance that blocks the system and causes widespread damage to internal components. To learn more about the different types of coolant, read our guide to different coolant/antifreeze colours.įirst, what’s important to know is that many IAT and OAT coolants do not mix. Products like these offer advanced corrosion and heat protection, not to mention an incredible longevity of up to 300,000 miles. Newer more advanced and premium coolant/antifreeze like Prestone are based solely on the OAT chemical make-up. There are also ‘hybrid’ coolants that use a blend of OAT and IAT compounds. Generally coolants are divided into two separate camps: organic acid technology coolants (OAT) and inorganic additive technology (IAT) coolants. This can make things a little trickier when it comes to choosing different brands of coolant/antifreeze and mixing them in your cooling system. But unlike the original red and blue variants, the colour you choose might not be the right one for your vehicle. Today coolants come in a range of colours from green to orange to pink. Historically coolant/antifreeze came in either red or blue – these colours told us about the specific formula and ingredients of each product, but this is no longer the case. What Are the Different Types of Coolant for Your Car?
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