Most car owners know that they need to change their oil every 5,000 miles or so. But what about coolant and antifreeze? Do they expire? The answer is yes and no. The simple answer is that antifreeze does not have an expiration date, but it can degrade over time.
What Are Coolant & Antifreeze?
Coolant and antifreeze are two similar but distinct products. Both are used to help regulate the temperature of engines, and both can be added to the radiator. However, coolant is typically used in warmer climates, while antifreeze is reserved for colder regions. The main difference between the two is that antifreeze contains additional chemicals that lower the freezing point of water, preventing the radiator from freezing in cold temperatures. Coolant, on the other hand, is designed to simply keep the engine cool and does not contain any anti-freezing agents. As a result, it should never be used in place of antifreeze in cold weather. While coolant and antifreeze serve similar purposes, it is important to choose the right product for your climate to ensure optimal engine performance. Your car's cooling system is responsible for keeping the engine from overheating. The coolant helps transfer heat from the engine and into the air. Over time, though, the coolant can become contaminated with rust, oil, and other debris. This can cause it to become less effective at doing its job.
How Long Does Coolant & Antifreeze Last?
The frequency you need to flush your car's coolant system depends on the coolant you use. Silicated coolants need to be flushed every two years or 30,000 miles, while extended drain coolants can last up to five years or 100,000 miles before needing a flush. You can tell which type of coolant you have by its color - silicated coolants are usually green, while extended drain coolants are typically amber or red. If you're unsure about the type of coolant or antifreeze in your car, consult your owner's manual or a professional mechanic. Either way, it's important to keep your car's cooling system in good working order to avoid overheating and expensive repairs down the road. Although the shelf life for either is indefinite.
How Do I Know When It's Time To Change My Coolant/Antifreeze?
If the engine coolant or an antifreeze solution in your car looks like it has rust in it, or if it has changed color from the green or orange it originally was, that is a sign you have bad coolant. You should bring it in for a coolant flush as. Antifreeze coolant tubes can easily become clogged, which impedes the cooling process and can cause your engine to overheat. A professional can quickly and easily change the coolant or antifreeze for you, preventing further damage to your car. It is always best to err on the side of caution when it comes to your car's engine, so if you are ever unsure about something, don't hesitate to bring it in to be checked out.
While car coolants don't technically have an expiration date, they can degrade over time. The best way to know if your coolant or antifreeze solutions need to be replaced is to take it to a professional care service center for testing or keep an eye on the color of the fluid - if it's dark brown or rusty, that means it's time for a replacement.