Can Unopened Engine Oil from 2014 Still Be Used?
1 Answers
2014's unopened engine oil generally cannot be used. The shelf life of unopened engine oil is typically around 5 years. If the oil has been stored for too long, its chemical composition may deteriorate, and it is recommended not to continue using it to avoid damaging valve seals and the engine. Below are some precautions for using engine oil: Under proper storage conditions, engine oil can last for 4 to 5 years. Once opened, its sealed storage period is generally about one year. The greater the temperature fluctuations and humidity in the storage environment, the faster the oil will deteriorate. For every 10-degree Celsius increase in temperature, the lifespan of the oil is halved. Avoid leaving the oil cap open and exposing it to sunlight. The correct method is to store the oil in a sealed, cool place. Poor sealing can lead to oxidation when the oil comes into contact with air, and high temperatures accelerate this oxidation process. If the engine oil in the car has been used for a relatively long period, such as covering half the usual maintenance interval mileage, the storage time should be reduced. It is recommended to replace the oil if it has been stored for more than 3 months before the next use. Leftover oil from maintenance, if stored properly, can be kept for about one year.
