Can Different Coolants Be Mixed?

[LilahFitz]

Coolants should not be mixed. Two different coolant additives must never be used together, as different brands of coolants have varying chemical compositions. Mixing them can easily trigger chemical reactions, which may severely damage rubber seals, often leading to leaks at the water pump seal or welded joints. Precautions for Mixing Coolants: Always use the same brand of coolant. Different brands of coolants have distinct production formulas, and mixing them may cause chemical reactions between additives, rendering them ineffective. Coolant Replacement Cycle: For vehicles that operate for extended periods, such as taxis, high-quality coolants should generally be replaced annually. Vehicles with shorter operating hours can have their coolant replaced every two years or every 30,000 kilometers. To prevent excessive foaming, which reduces the heat exchange efficiency between the coolant and engine components, ensure the product is within its validity period when adding it. Long-life coolants can remain effective for up to three years. If suspended particles, sediment, or signs of deterioration or discoloration are observed in the coolant, replace it promptly and clean the system.