When to Add Antifreeze?
2 Answers
Vehicle antifreeze generally needs to be replaced every 2 years or 40,000 kilometers. This is just a reference interval. For commercial vehicles with higher mileage, the replacement cycle should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Check the antifreeze level regularly and top it up promptly if it is insufficient. If suspended particles, sediment, or signs of deterioration or discoloration are observed in the antifreeze, replace it immediately and clean the system. Types of Antifreeze: Antifreeze is generally categorized into three types: ethanol-water, glycerin-water, and ethylene glycol-water. How to Choose Antifreeze: The key indicators for antifreeze are its freezing point and boiling point. Available antifreeze products in the market come with freezing points of -15°C, -25°C, -30°C, -40°C, etc. It is advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region. Functions of Antifreeze: Antifreeze is non-corrosive and is a specialized coolant containing additives. It is primarily used in liquid-cooled engine cooling systems. Antifreeze provides excellent performance in preventing freezing in winter, boiling in summer, and protecting against scale and corrosion year-round.
When should antifreeze be added? After driving for ten years, I believe the key is regular fluid level checks. Generally, take a quick glance at the reservoir when the engine is cold each week, and top it up if the level falls below the MIN line. Evaporation speeds up in summer heat, and winter requires freeze protection—seasonal transitions are especially crucial. Don’t forget to test the freeze-point concentration to ensure it remains effective below -20°C. Once, I skipped a pre-road-trip check and nearly overheated due to low fluid—my engine suffered, but I learned my lesson. Always use OEM antifreeze and avoid mixing different colors to prevent radiator corrosion. Once it becomes a habit, just five minutes can keep your car healthy and avoid costly repairs.
