Coolant

Are antifreeze and coolant the same thing? Should engine coolant be orange, green or a different color? This article will help answer these questions and more.

• Coolant
• Coolant

What Is Engine Coolant?

How to Change Coolant Overview. In the old days (generally before 2000), changing your vehicle’s coolant was simple. That procedure is shown in Step 2, below. After 2000, cars got more complex and many DIYers got intimidated by the precise filling and “air-bleeding” procedures required to eliminate engine air pockets. Coolant Filter, Inline, Aluminum/Glass, Chrome, 1.500 in. Inlet, 1.500 in. Part Number: SUM-390166. Antifreeze / Coolant You don't want to discover the significance of antifreeze by being forced to pull over, due to an overheated engine. Antifreeze contains lubricants and anti-corrosion agents to keep components like your radiator properly lubricated and free from corrosion. Coolant burn-out is the term associated with the effect of temperatures rising above the boiling temperature for the process fluid. From: Tribology of Abrasive Machining Processes, 2004 Related terms.

Engine coolant, also known as antifreeze, is mixed with water to keep the radiator from freezing in extreme cold and overheating in extreme heat. There are many different types of coolant, so it’s important to know what variety is right for your car or truck.

Different Coolant Types

Different vehicles require different coolants. There are varieties for every type of vehicle, from diesel engines to American, Asian and European vehicles. Each one is specifically formulated to keep its designated engine type running in extreme temperatures. It’s important to know the differences so you get the correct antifreeze for your vehicle.

IAT Coolant

The most common variety of liquid antifreeze is an IAT formula, or Inorganic Additive Technology. ZEREX™ Original Green is an IAT coolant that has been used for decades and is a formula proven to provide unsurpassed corrosion protection.

Dex-Cool™ Coolant

Another common antifreeze formula is Dex-Cool®, a coolant formula approved for use in GM vehicles. An option like ZEREX™ Dex-Cool Antifreeze/Coolant, is automaker-approved and meets or exceeds multiple industry specifications.

Coolant for Older Cars

Since coolant technology has evolved so much in the last few decades, if you own an older vehicle you need a formula with a special additive to allow chemistries old and new to work together. MaxLife™ Antifreeze/Coolant helps extend the life of higher mileage vehicles with the additive AlugardPlus®.

The Colors of Coolant

You might be thinking, “What color is antifreeze? What color is Dex-Cool®?” It’s true, coolant liquid comes in different colors, most commonly green (orange for Dex-Cool®). Each color is a unique formula that should not be mixed. The below chart will help you decipher which fluid is in your vehicle. Reminder, you can often find the recommended type of coolant in your vehicle’s owner’s manual.

Coolant

Coolant