What is the Difference Between Green and Red Antifreeze?

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Red antifreeze and green antifreeze have different compositions. The main component of red antifreeze is propylene glycol, while the main component of green antifreeze is ethylene glycol. The functions of antifreeze: Antifreeze is a coolant containing special additives, primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and providing year-round protection against scale and corrosion. Types of antifreeze: Antifreeze is generally categorized into three types: ethanol-water, glycerol-water, and ethylene glycol-water. Antifreeze replacement cycle: For vehicles that operate for extended periods, such as taxis, high-quality antifreeze should generally be replaced annually. For vehicles with shorter operating times, replacement can be done every two years or every 30,000 kilometers. To prevent excessive foam formation, which reduces the heat exchange efficiency between the antifreeze and engine components, ensure the product is within its validity period when adding it. Long-life antifreeze can remain effective for up to three years. If suspended particles, sediment, or signs of deterioration or discoloration are observed in the antifreeze, it should be replaced promptly, and the system should be cleaned.