Introduction: Why is coolant important?
You must have heard the name of antifreeze radiator coolant, but do you know how important it is for the engine? If your car overheats in summer or winter, it may be that your coolant is not working. In this article we will know everything related to antifreeze and radiator coolant in detail.Antifreeze coolant (also known as radiator liquid) protects your vehicle’s engine from heat, corrosion and freezing. It not only increases the life of the engine but also improves fuel efficiency.
- In this article, we will learn:
- How does antifreeze coolant work?
- Types of coolants (OAT, IAT, HOAT)
- What is the best coolant in 2025?
- What to look for when choosing a coolant?
What is antifreeze coolant?
- Antifreeze coolant is a special chemical mixture that:
- Prevents the engine from overheating
- Prevents freezing in winter
- Protects the radiator and pipes from corrosion
- Withstands higher temperatures than water
How many types of cooling are there in 2025
A. Inorganic Additive Technology (IAT) – For older models
- Color: Green
- Replacement period: Every 2 years or 40,000 km
- In which vehicles is it used?
- Maruti 800, Alto, Wagon R (old models)
- In cheaper vehicles
B. Organic Additive Technology (OAT) – For new cars
- Colour: Orange/Red
- Replacement period: Every 5 years or 1,00,000 km
- In which vehicles is it used?
- Hyundai Creta, Kia Seltos
- Honda City, Toyota Innova
C. Hybrid Organic Additive Technology (HOAT) – For European cars
- Colour: Blue/Purple
- Replacement period: Every 4 years or 80,000 km
- In which vehicles is it used?
- Volkswagen Polo, Skoda Rapid
- Tata Nexon, Mahindra XUV700
Best Coolant Brands in India in 2025
| Brand | Price Range | Specialty |
|---|---|---|
| Belmont antifreeze coolant | ₹300-₹500 | Affordable, widely available |
| Motul Motocool | ₹500-₹800 | High-performance bikes & cars |
| Bosch Coolant | ₹400-₹700 | OEM-grade, reliable |
| Tata Green | ₹250-₹450 | Budget-friendly for Indian cars |
How to Choose the Best Radiator Coolant in 2025
1. Check the vehicle manual
- Each car manufacturer recommends a different coolant type.
2. Choose according to the climate
- Hot areas (Rajasthan, Gujarat): OAT coolant (Belmont antifreeze coolant)
- Cold areas (Himachal, Jammu): HOAT coolant (Shell Helix)
3. Do not mix the color of coolants!
- Mixing coolants of different colors can cause a chemical reaction.
4. Prefer long-life coolant
OAT coolant (like Toyota Super Long Life) lasts up to 5 yea
How to know when it’s time to change the coolant?
- Coolant color has changed (murky or brown)
- Radiator or engine overheating
- Replacement is recommended every 2 years or 30,000 mileage
Things to keep in mind while changing the coolant
- Let the engine cool down (do not change coolant on a hot engine).
- Drain the old coolant completely.
- Use distilled water (not tap water).
- Check for leaks (check radiator, pipes).
Frequently Asked Questions (FAQ)
Q1. Can I increase the coolant by adding water?
- Yes, but only in emergency. Always use distilled water + coolant mix.
Q2. Is the coolant of car and bike the same?
- No! There is a different coolant for bikes (like Belmont antifreeze coolant).
Q3. How much will it cost to replace the coolant?
- ₹500-1500 (depends on vehicle and coolant brand).
Q4. Can water do the work?
- No. Normal water can damage the engine in the long term.
Q5. Which is the best coolant for summer?
- Premixed coolant or red/pink long-life coolant is best for summer.
Q6. Is the same coolant used in bikes as well?
- A high-performance coolant like Belmont or castrol is better for bikes.
Conclusion (2025 update)
- For new cars (Hyundai, Kia): Belmont antifreeze coolant(OAT)
- For old cars (Maruti, Tata): Castrol Radicool (IAT)
- For European cars (VW, Skoda): Shell Helix (HOAT)
If your vehicle overheats frequently, be sure to check the coolant level.
Do you want to know how to change the coolant yourself? Ask in the comments!