Can unopened expired antifreeze still be used normally?

[ColeFitz]

Unopened expired antifreeze cannot be used because the active ingredients in antifreeze will precipitate after expiration, causing the liquid to lose its antifreeze capability. At low temperatures, it will freeze and potentially damage engine components, radiators, and other cooling system parts. Antifreeze replacement cycle: 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's condition—if it is insufficient, replenish it promptly. If suspended particles, sediment, or signs of deterioration or discoloration are observed, replace the antifreeze immediately and flush the system. Antifreeze composition: The main components of antifreeze are: 50% purified water, 40% methanol, and 10% other substances. Types of antifreeze: Antifreeze is generally categorized into three types: ethanol-water, glycerin-water, and ethylene glycol-water.