Antifreeze Or Coolant For Your Radiator? Learn The Difference
Key Takeaways:
- Coolant and antifreeze are often used interchangeably, but they are not the same thing.
- Car Antifreeze is a chemical added to coolant that lowers the freezing point of water, preventing it from freezing in cold weather.
- There are three main types of coolant: ethylene glycol, propylene glycol, and Dexcool.
- Check the condition of your coolant. If it is dirty or contains rust, you must replace it.
As a vehicle driver, you should know that your radiator is essential to your car. It’s responsible for keeping your engine cool – so it’s crucial to keep it in good condition. There are different types of car antifreeze you can put in your radiator. It can be confusing to figure out which one is right for your vehicle. So today, Team One Hyundai of Gadsden will break it down for you and explain the differences between all the different types of radiator fluid.
The Winter & Your Car’s Engine
With its freezing temperatures, winter can be challenging for your car’s engine. During winter, the water in your radiator can freeze, causing pistons can expand, resulting in severe damage to your engine block. To prevent this, you need to add a special solution to your radiator comprising antifreeze and water. But what’s the difference between these two types of radiator fluid? Let’s take a closer look.

What is Car Antifreeze?
Antifreeze contains chemicals – usually ethylene glycol or propylene glycol – with a lower freezing point than water. This product is added to the radiator after mixing it with water to prevent the water from freezing, even in the coldest temperatures. In addition to preventing freezing, antifreeze also raises the boiling point of the water in your radiator, which helps to keep your engine running cooler and prevents overheating.
What is Coolant?
Coolant is simply a mixture of water and car antifreeze. This mixture is added to your radiator to help keep your engine running at the proper temperature, regardless of the outside temperature.
Coolant does two main things: it lowers the freezing point of water and raises the boiling point. That’s important because your engine produces a lot of heat when running. The coolant helps to keep the engine from overheating by transferring that heat away from the engine.
Water alone can’t do this effectively because it has a high boiling point and a low freezing point. So, if you use just water in your radiator, it will boil at a lower temperature than usual, but it will also freeze at a lower temperature than normal. That’s why you need to add a coolant to the water in your radiator.
The Difference Between the Two
Though they may seem similar, antifreeze and engine coolant are not the same. Antifreeze is a concentrated, glycol-based liquid that must be diluted with water before it becomes a coolant. On the other hand, engine coolant is a premixed solution of water and antifreeze.
The boiling point (B.P) of your coolant is higher than that of water, so it helps to keep your engine from heating excessively in hot weather. In cold weather, the mix of water & car antifreeze will not freeze as easily as pure water.
Which One Should You Use?
The answer to this question relies on whom you ask. Still, most experts recommend using a 50/50 mix of water and antifreeze, also known as coolant. This will give you the perfect protection combo against both overheating and freezing.
What Happens If My Car’s Engine Freezes or Overheats
In a nutshell, A frozen engine can cause severe damage. The water in the coolant can turn to ice, expanding and cracking the engine block, cylinder heads, and radiator. A frozen engine can also cause the coolant hoses to burst and the thermostat to fail.
An overheated engine can also cause serious damage. The pistons can expand, causing the rings to lose their seal and the valves to bend. The cylinder head can warp, and the bearings can fail. An overheated engine can also lead to a blown head gasket, cracked cylinder heads, and warped intake manifolds.
When Is Car Radiator Fluid Replacement Necessary?
Check the condition of your coolant. If it is dirty or contains rust, you must replace it. You should also replace the coolant if it has been in your car for more than two years. To do this:
- Drain the old coolant from the car’s radiator and refill it with a new coolant.
- Keep in mind that coolant is poisonous, so dispose of it properly.
- Do not pour it down the drain!
Types Of Car Coolants You Can Use for Hyundai
The best type of coolant for your Hyundai will depend on the model of your car. Check your car’s owner’s manual to see what type of coolant it requires. You can also check under the hood; a sticker should list the types of coolant compatible with your car.
If unsure, propylene glycol-based coolant is a good choice for most cars. It doesn’t cost much and is not as toxic as ethylene glycol-based coolant if it leaks out.
There are three types of coolant you’ll find on the market today:
- Ethylene glycol-based coolant – transfers heat effectively, but it’s toxic.
- Propylene glycol-based coolant – non-toxic, works effectively.
- Dexcool (a trademarked type of ethylene glycol-based coolant) – It’s designed to last longer than other types of coolant and is less likely to cause corrosion.
Bottom Line
To sum it up, you need to know what type of coolant or antifreeze your car needs. If unsure, propylene glycol-based coolant is a good choice for most cars. It’s not expensive, and it’s effective. But, regardless of which type you choose, check your coolant level regularly and top it off if it leaks out.
Here’s How Team One Hyundai of Gadsden Can Help!
Team One Hyundai of Gadsden, serving Glencoe, AL, and the surrounding areas, is glad to help you with all your automotive needs, including car antifreeze and coolant. We have a state-of-the-art Service Department with certified technicians who are experts in Hyundai models. Schedule an appointment today!

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