Can Old and New Antifreeze Be Mixed?
1 Answers
Old and new antifreeze cannot be mixed unless they are of the same brand. Different brands of antifreeze may have varying production formulas, and mixing them could lead to chemical reactions between the additives, rendering them ineffective. How to Choose Antifreeze: The basic indicators of antifreeze are its freezing point and boiling point. On the market, antifreeze comes in several specifications with freezing points such as -15°C, -25°C, -30°C, and -40°C. Generally, it's advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region. Antifreeze Replacement Cycle: For vehicles that run for long periods, such as taxis, high-quality antifreeze should generally be replaced once a year. For vehicles with shorter running times, replacement can be done every two years or every 30,000 kilometers. To prevent excessive foam formation, which can reduce the heat exchange efficiency between the antifreeze and engine components, ensure the product is within its validity period when adding it. Long-lasting antifreeze can have a validity period of 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.
