Coolant is much more than just colored water. It is a carefully balanced mix of chemicals that prevent your engine from overheating, reduce rust, and keep your radiator and pipes running smoothly. If you use a weak or outdated coolant in Saudi Arabia’s harsh climate, you risk faster evaporation, engine overheating, and even expensive damage to gaskets and internal parts.

There are several types of coolant available in Saudi Arabia in 2025:

• Green coolant (IAT) is for older cars built before 2005. It is affordable but needs to be changed every 30,000 kilometers and does not last long in extreme heat.
• Red or pink coolant (OAT) is now the top pick for most modern cars in Saudi Arabia. It protects against rust, resists wear, and can last up to 150,000 kilometers. It is recommended for brands like Toyota, Lexus, Honda, and Hyundai.
• Orange or yellow coolant (HOAT) is for many European cars like Mercedes, BMW, and Volkswagen. It offers a strong balance of protection and high temperature resistance.

Start by checking your owner’s manual, since every carmaker recommends a specific coolant for its models. In Saudi Arabia, you want a coolant that can handle boiling points above 120 degrees Celsius. Never mix different types of coolant. For example, mixing red and green can cause thick clogs that harm the radiator and water pump. If you switch types, always flush the system completely before adding new fluid.

The best practice is to use a 100 percent ready to use coolant and avoid adding regular water. If you have to dilute, always use distilled water, never tap water, to prevent mineral buildup.

Some of the best coolant brands you will find in Saudi Arabia in 2025 include Prestone, Toyota Super Long Life, ACDelco, Zerex, and Valvoline. Change your coolant at least every two years or follow your manufacturer’s recommendation. Watch for signs that your coolant needs replacing like a sudden rise in engine temperature, a rusty or brown color in the fluid, a sweet smell around the engine, or a steady drop in the coolant level.

Taking care of your cooling system with the right coolant will keep your engine healthy, prevent costly repairs, and make sure your car stays cool no matter how high the Saudi sun climbs.