The Different Colors of Coolant The Different Colors of Coolant. If an engine is used without coolant ( antifreeze ),. What are the benefits of using coolant?
The biggest thing to look out for is using the organic acid technology ( OAT ) in older vehicles with brass or copper radiators.
OAT antifreeze is designed to be used. These days, there’s no real reason for a coolant manufacturer to use a certain colour, so it’s not easy to know what chemicals are in the coolant just by seeing whether it’s blue , green, yellow or orange. If you are low on fluid or have a leak, a general rule of thumb is, green IAT is always replaced by green IAT coolant. Dex-Cool or an OAT product with equivalent specifications is always necessary to replace orange or yellow organic-based antifreeze.
For the rainbow of colors of HOAT,. You might be thinking, “What color is antifreeze? Each color is a unique formula that should not be mixed. The below chart will help you decipher which fluid is in your vehicle.
Watch for signs of oil or rust. The color of healthy engine coolant is green (for ethylene glycol ) or orange (for Dexcool).