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Types Of Antifreeze & How To Choose The Right One

Types Of Antifreeze & How To Choose The Right One | Springdale Automotive

Ever wonder what keeps your car cool in the scorching summer and unfazed in the freezing winter? The answer lies in a little magic potion known as antifreeze. This part of your car’s engine plays a pivotal role in maintaining your vehicle's health, but with different types available, how do you choose the right one?

Understanding Antifreeze

Antifreeze does more than just prevent the engine from freezing in winter; it also keeps it cool in summer and protects it from corrosion. The key ingredients in antifreeze include ethylene glycol or propylene glycol, along with additives to resist corrosion. Knowing what makes up antifreeze is the first step in choosing the right type for your vehicle.

The Different Types - Colors and Composition

Antifreeze, essential for your car’s engine health, isn’t a one-size-fits-all solution. Its variety is reflected in its colors, each designed for specific engine types and materials. Let’s explore these types in more depth:

Green Antifreeze

Traditional green antifreeze, typically ethylene glycol-based, is known for its silicate and phosphate additives. These additives are excellent at preventing corrosion in older engines, especially those with a lot of metal components. Green antifreeze has a shorter lifespan and typically needs to be changed every 30,000 miles or so. It’s a go-to choice for many older vehicles (usually pre-2000 models) but may not be suitable for newer models that require more advanced formulations.

Orange Antifreeze

Often known by its trade name Dex-Cool, orange antifreeze is a more modern formulation that’s silicate and amine-free. This type uses organic acid technology (OAT) for corrosion protection. It's designed for newer car models, offering a longer lifespan—usually up to 5 years or 150,000 miles. It’s particularly beneficial for cars with aluminum engines, as it helps prevent the corrosion that silicates can cause over time in these engines. However, it’s crucial not to mix it with the green type, as this can lead to gelling and decreased cooling efficiency.

Yellow and Pink Antifreeze

These types are often propylene glycol-based, making them less toxic and more environmentally friendly compared to ethylene glycol antifreeze. The pink and yellow antifreezes are often used in European and Japanese cars, respectively. They contain different corrosion inhibitors that are specific to the materials used in these vehicles' engines. These types are known for their long life and are often used in vehicles that require a hybrid organic acid technology (HOAT) formulation.

Each of these types is formulated to meet specific cooling and corrosion-inhibition requirements, depending on the engine design and the metals used in its construction.

Mixed Antifreeze - Do's and Don'ts

Mixing antifreeze types can be a risky business. It’s not just about the color; it’s about the chemical composition. For instance, mixing an OAT antifreeze (like the orange type) with a silicate-based one (like the green type) can lead to reduced cooling efficiency and even cause clogs and corrosion in the cooling system. 

The best practice is to stick to the manufacturer's recommendation. If you’re unsure or if the system has been contaminated with a different antifreeze, a complete cooling system flush followed by refilling with the correct type is the safest approach. Checks and maintenance of the cooling system will ensure optimal performance and prolong the lifespan of your car's engine.

Considerations for Mixed Antifreeze - Do's and Don'ts

Mixing different types of antifreeze can be risky. While some are compatible, others may react badly together, leading to clogging and corrosion. As a rule of thumb, if you're topping off your coolant, stick to the same type that's already in your engine. If unsure, a complete flush and refill with the recommended type is the safest bet.

Keeping Your Cool

Regular checks of your antifreeze levels and condition are crucial. Over time, antifreeze can become acidic and lose its effectiveness, putting your engine at risk. Regular maintenance ensures your engine stays cool and corrosion-free throughout the year.

Visit us at Springdale Automotive in one of our locations, and we will take care of anything your car needs! From a simple fluid top-off to a system repair, we do it all.

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