How Long Can Antifreeze Be Stored After Opening?

[VanBrielle]

Generally, the expiration time can be determined by checking the shelf life indicated on the antifreeze and then subtracting a few months. Below are some related additional details: 1. Determining if it has expired: Observe the appearance and smell of the antifreeze. If the appearance is cloudy and the smell is abnormal, it indicates that the antifreeze has severely deteriorated and should not be used further. Under normal circumstances, unopened antifreeze has a shelf life of 3 years when stored in good conditions. Opened antifreeze should be used as soon as possible, and the production date should be checked before use. Antifreeze older than two years should be used with caution. 2. Precautions: For vehicles using antifreeze, never directly add tap water; instead, use distilled or deionized water. If these are not available, adding cooled boiled water is still better than adding tap water. It is best to use clean, soft water for the car engine's cooling system.