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Basic Understanding on Automotive Coolants

Basic Understanding on Automotive Coolants

What is a Coolant?

Automotive coolant, also known as antifreeze, protects engines from overheating. Coolant also lubricates the moving parts it comes into contact with, which protects damage to the water pump, head gasket, the cylinder and piston timing.


Why is Coolant Essential in an Automobile?

In older cars, engine cooling systems were mostly brass, rubber parts and cast iron, so engine coolants were all pretty much the same. These days, automobile cooling systems have parts made from copper, silicon, nylon, steel, and magnesium and aluminum alloys. The type of coolant required by your vehicle can now vary by year, make, model, engine and even the country where the car was made. With so many factors in play, car owners need to know which type of engine coolant is right for their vehicle.

Most drivers don’t give engine coolant a second thought. It’s just another item under the “check fluids” service included with an oil change. However, engine coolant performs three vital jobs: 

  • It lowers the freezing point of the cooling system in winter.
  • It raises the boiling point of the cooling system in summer.
  • It protects the engine and cooling system from rust and corrosion year round. 

If your car’s cooling system is not topped off or refilled with the correct coolant, expensive problems could result.


Different Type of Coolants.

Many modern automobiles require enhanced engine coolants to properly maintain the vehicle’s cooling system and protect the engine from damage. Today, automotive service providers use three basic types of engine coolant:

IAT – Inorganic Additive Technology

For decades, this distinctive green-colored coolant protected cooling systems, but it is rarely used as factory fill in modern cars. One reason is the fast depletion rate of its additives, which means it has to be changed more frequently, usually every two years or 24,000 miles.

OAT – Organic Acid Technology

Commonly required for vehicles manufactured by General Motors, and some other automakers, OAT coolants are not compatible with other types. Usually orange, yellow, red or purple, OAT coolants are typically changed every five years or 50,000 miles.

HOAT – Hybrid Organic Acid Technology

Providing the benefits of both IAT and OAT coolants, HOAT coolants are primarily orange and yellow and are common in Chrysler and Ford vehicles. OAT coolants are typically changed every five years or 50,000 miles, although some automakers specify intervals as long as 10 years or 150,000 miles.

Hybrid and Electric Vehicle Cooling Systems

Most hybrid and electric vehicles have a separate cooling system for the battery pack. Only coolants that meet the automakers’ specifications should be used in these systems.

Valeo Range of Coolants: 

ProctectivTM Liquid Coolants The best Solution for your cooling system


Advantages of Valeo Coolant:

  • Premium Quality Coolants with Universal applications
  • Antifreeze elements for usage in Sub-Zero Temperature range.
  • Anti Corrosive 
  • Enhanced Engine Protection
  • Longer Life of Cooling Systems
  • Available in all Range and Quantity 


Things to Remember


Here are a few other points to remember when it comes to your engine coolant choice:

1. Coolant type cannot be accurately identified by color. Both OAT and HOAT are often orange or yellow, so they can be easily misidentified.

2. Automakers don’t adopt new coolants on a simple schedule. It’s entirely possible for two vehicles from the same manufacturer to use two completely different coolant types.

3. Just because a vehicle had one type of coolant when it left the factory doesn’t mean a different type of coolant wasn’t installed at some point in the life of the vehicle. When changing back to the factory recommended coolant, a complete cooling system flush should be performed first.

One great way to ensure you get the right coolant to keep your vehicle on the road and running smoothly is by having your vehicle maintenance periodically.

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