What is Antifreeze?

Man Filling Antifreeze Fluid in His Car

While most drivers in the Hudson and Merrimack area have heard of antifreeze, not everyone knows its exact purpose. So, what is antifreeze used for? The team at Tulley Mazda is here to explain the following questions for our Lowell neighbors:

  • What is antifreeze?
  • What is antifreeze used for?
  • Why is antifreeze important?

What is Antifreeze?

A common question we hear at our service center is, “Is antifreeze coolant?” While the terms are often used interchangeably, coolant is actually a mixture of antifreeze and water. Usually, coolant mixtures will contain 50% antifreeze and 50% water. However, you can choose more potent (and more costly) coolant options that contain 70% antifreeze and 30% water. It might sound like antifreeze and coolant contradict one another, but they are both important to regulate the temperature of your vehicle.

Usually antifreeze is composed of ethylene glycol or propylene glycol, and it is likely green, pink, or orange in color. Most vehicles require green antifreeze, but it is a good idea to consult your owner’s manual to see which type is required for your particular make and model. 

What is Antifreeze Used for?

Antifreeze is stored in your vehicle’s radiator and is connected by a reservoir in the engine bay. Your vehicle’s water pump circulates antifreeze throughout the engine to draw heat away from your engine that was produced during the combustion process. The now-hot coolant circulates back to the radiator, where it is cooled down by air. This process happens over and over again as you drive through Salem to ensure your vehicle operates at the proper temperature. 

Why is Antifreeze Important?

Antifreeze ensures your vehicle runs at a safe temperature. Not only does it help to prevent overheating, it is also designed to keep your coolant from freezing when temperatures fall below zero. If your engine did not have coolant, the following components would sustain damage over time:

  • Water Pump
  • Engine Cylinders
  • Connector Rods
  • Head Gasket

Turn to Tulley Mazda for Quality Auto Service

At Tulley Mazda, it is the goal of our service center to keep your vehicle running smoothly for many years to come. If you have any questions about automotive maintenance, you can contact us at your convenience. 

More from Tulley Mazda

  • 2021 MAZDA CX-5 Trim Levels

      The Mazda CX-5 is a popular pick among Hudson drivers, and it’s not hard to see why. What can be a challenge is narrowing down your search to find the configuration best suited to your driving needs and budget. That is why the team at Tulley Mazda has put together this Mazda CX-5 trim comparison….

  • 2021 MAZDA3 Gas Mileage

    Mazda gas mileage often leads the pack thanks to efficient options across the lineup like the Mazda3 sedan and hatchback. The 2021 Mazda3 gas mileage definitely does not disappoint no matter which configuration you prefer. Learn more about the Mazda3 gas mileage for each trim below to find your perfect match for Hudson roads. Then…

  • 2021 MAZDA CX-5 Dimensions

    When shopping for the perfect family vehicle around Hudson, you need a vehicle that has ample space for both passengers and cargo. Fortunately, the Mazda CX-5 has just what you’re looking for — at a great price, no less. The 2021 Mazda CX-5 dimensions reveal a crossover that doesn’t sacrifice space for occupants or your…

Saved Vehicles


You don't have any saved vehicles!

Look for this link on your favorites:


Once you've saved some vehicles, you can view them here at any time.

Contact Us


(603) 888-0550

Call Now


(603) 888-0550

Call Now


(603) 888-0550

Call Now

147 Daniel Webster Hwy • Nashua, NH 03060

Get Directions

Today's Hours:

Open Today! Sales: 11am-4am

Service: Closed

Parts: Closed

Tulley Mazda 42.7246467, -71.4491792.