Are all coolants antifreeze? Should I choose an orange coolant? Such queries do arise in almost every car owner's mind in selecting the appropriate engine coolant.
Technically, engine coolants are called anti-freezes. Hence, they keep an engine's temperature far away from both extremes: overheating at high temperatures and freezing at low temperatures.
Following are the details that should help you in coming up with the right decision regarding which engine coolant shall be the most appropriate for your car.
Let us assist you in finding the perfect fit for your car!
All You Need to Know About Engine Coolants
Engine coolants are a blend of ethylene glycol or propylene glycol antifreeze and water. An antifreeze coolant includes extra components to assist in avoiding corrosion and scaling in the system. It reduces the temperature at which the liquid in the engine's cooling system freezes and increases the temperature at which it boils.
5 Types of Coolant
Following are the several types of engine coolants that can be used on particular vehicles for certain climates and operating conditions.
1. Inorganic Acid Technology (IAT)
Traditionally, this coolant was used in older vehicles; it is normally green in color and contains silicates and phosphates. IAT coolants tend to have shorter life spans, normally requiring changes every two years or so.
2. Organic Acid Technology (OAT)
OAT coolants are commonly used in newer cars, usually colored orange or red and free from silicates and phosphates. They offer protection for longer periods and are more eco-friendly, although some types will be incompatible with older models.
3. Hybrid Organic Acid Technology (HOAT)
It is the combination of properties of IAT and OAT and commonly possesses colors like yellow and pink.
4. Waterless Coolants
Unlike traditional coolants, waterless coolants do not contain water, eliminating the risk of corrosion that can stem from water in the system. They can be used in a variety of applications, though initially switching from conventional coolant requires preparation.
5. Diesel Engine Coolants
Some extra additives are included specifically for diesel engines to cater to the protection against cavitation that might be experienced in diesel engines. They usually come in various colors, often red.
Key Factors to Consider When Selecting Coolant
When determining which engine coolant for my car will work well, several factors must be considered:
1. Vehicle Specifications
Always consult your vehicle's owner's manual for the recommended coolant type. The manual contains specific guidelines regarding the required coolant type, concentration, and whether certain coolants can be mixed.
2. Climate Conditions
The typical temperature range in which you drive can influence your choice of coolant. In very cold climates, one should make the percentage of antifreeze a little higher to avoid freezing. If the weather is warm, something closer to a 50:50 dilution could be used.
3. Age of the Vehicle
Older vehicles usually require other types of coolants than newer ones. Classic cars, for instance, usually run best on IAT coolants, while on other, more updated models of vehicles, the OAT or HOAT coolants may also run best.
4. Compatibility
Sludge can be produced with chemical reactions when various types of coolants are mixed together so it is not effective for the objective of coolants. If you change from one type to another, then it is recommended that you do a full flush of the system to avoid contamination.
5. Environmental Considerations
Propylene glycol antifreeze is biodegradable and non-toxic. This makes this glycol-based coolant a better alternative for those with pets or small children.
Top Recommended Engine Coolants
Based on extensive reviews, tests, and expert advice, here are some of the best engine coolants for 2024, categorized by different vehicle needs and specifications:
Valvoline Multi-Vehicle Ready-to-Use Antifreeze/Coolant: This universal coolant is suitable for a wide range of vehicles and features an "Aluguard" formula that helps prevent corrosion while being affordable and effective. It is ready to use, eliminating the need for mixing, and is compatible with mixing if necessary, although it should not be combined with waterless coolants.
EVANS High-Performance Waterless Coolant: This product is designed for all modern and classic engines and eliminates the need for water, thus preventing corrosion entirely. Once installed, it lasts the engine's life without needing replacement, making it cost-effective for long-term use.
Zerex Original Green Low Silicate Concentrate Antifreeze/Coolant: This is the original "green" coolant, engineered to provide corrosion and scaling protection for older engines in pre-2000 vehicles.
Shell Rotella ELC Nitrite Free Antifreeze/Coolant: This coolant has been specially developed for diesel engines and is designed to resist corrosion and pitting-a very important consideration, as diesel engines are so highly vibratory.
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FAQs
How do I know what type of coolant to use for my car?
Refer to your owner's manual to determine the correct type or color of antifreeze for your vehicle.
Does it matter what coolant is put into my car?
Each coolant is designed for specific engine materials and cooling systems. Using the incorrect type can cause chemical reactions that might damage internal components.
Which engine coolant for my car is best?
IAT (Inorganic Additive Technology) coolant is typically bright green and is widely popular for its excellent corrosion protection.