Can Expired Antifreeze Still Be Used?

[StJohnny]

Expired antifreeze cannot be used. Not only should it not be used, but it's also important to choose high-quality antifreeze and establish a proper maintenance plan for your vehicle. Using expired antifreeze can negatively impact your car. Generally, the shelf life of antifreeze is about two years. Precautions for using antifreeze: 1. Try to use the same brand of antifreeze: Different brands of antifreeze use different metal corrosion inhibitors, so they should not be mixed. 2. The validity period of antifreeze is mostly two years: When adding, ensure the product is within its validity period; when replacing, drain the old fluid completely, clean the cooling system, and then add new fluid. 3. Avoid diluting with water: Traditional inorganic antifreeze should not be diluted with water, as it can produce sediment, severely affecting its normal function. Organic antifreeze can be diluted with water, but not too much. 4. Flocculent sediment: Some antifreeze may develop a small amount of flocculent sediment after being stored for a year, which is usually caused by additive precipitation and does not require disposal. However, if a large amount of granular sediment appears, it indicates the antifreeze has deteriorated and should no longer be used.