Types of Coolant/Antifreeze Explained

This essential fluid helps protect engines from extreme temperatures - whether it’s the bitter cold of Canadian winters or the sweltering heat of a summer workday. But did you know there are different types of antifreeze, each designed for specific needs? Here's a simple guide to help you understand the main types and what makes each unique. 

1. Conventional Antifreeze (IAT)

Example: Catalys PolarZone Conventional SCA

Think of this as the classic choice. Conventional antifreeze typically uses inorganic acid technology (IAT) as its core formula. It provides excellent protection against rust, especially in older vehicles or equipment. However, it usually requires more frequent changes—every two years or so. 

Best for: Older vehicles and fleets where routine maintenance is frequent. 

2. Organic Acid Technology (OAT) 

Example: Catalys PolarZone Nitrite Free ELC

Organic Acid Technology (OAT) coolants are the robust modern alternative. Unlike conventional types, OAT antifreeze uses organic compounds to fight rust and corrosion. This translates to a longer lifespan, with some formulas lasting up to five years. They’re particularly effective in newer engines that require advanced protection. 

Best for: Modern engines that prioritize long-term performance with less maintenance. 

3. N-OAT (Nitrited OAT) 

Example: Catalys PolarZone HD Deisel ELC

Don’t be put off by the fancy name - N-OAT is another type of OAT. It it has a nitrite-based corrosion inhibitor, which provides additional protection against cavitation (a type of damage that occurs in heavy-duty diesel engines). Nitrite is required to meet the CAT EC-1 standard, which is very popular in the industry.

Best for: Diesel engines used in trucking, construction, or mining where maximum protection and extended engine life are essential

4. Hybrid Coolants 

Example: Catalys PolarZone Universal

As the name suggests, hybrid antifreeze blends the best of both worlds, combining the benefits of IAT and OAT. It offers reliable corrosion protection, and a longer service life compared to conventional options, though it has a shorter lifespan than OAT or N-OAT coolants.

Best for: A wide range of vehicles and equipment that need versatile and durable coolant solutions. 

Choosing the Right Antifreeze 

Not all antifreeze is created equal and using the wrong one can impact your engine’s performance. Always check your owner’s manual for recommendations and consider the unique needs of your fleet or equipment. If in doubt, consult with a trusted supplier or professional for advice. 

Need help selecting the perfect coolant? Contact us for expert advice tailored to your fleet: info@catalyslubricants.ca

Bottom Line 

Antifreeze may not be the star of the show in engine maintenance, but it’s the quiet hero keeping your fleet running smoothly. Whether you're sticking with conventional options or upgrading to OAT, the right antifreeze makes all the difference. Want to keep your equipment performing at its best? Give your antifreeze the attention it deserves—you'll thank yourself later!