Does motor oil have an expiration date?

[LaArcher]

Motor engine oil does have an expiration date. Generally speaking, unopened oil can be stored for 4-5 years. If properly resealed and stored under suitable conditions, the shelf life is 1 year. The primary factor affecting oil's shelf life is storage conditions. The greater the temperature fluctuations and humidity in the storage environment, the faster the oil deteriorates. For every 10°C increase in temperature, the oil's lifespan is halved. More details are as follows: 1. Never leave the oil cap off and expose the oil to sunlight. The correct practice is to store oil in a sealed, cool place. Poor sealing allows oil to oxidize upon contact with air, and high temperatures accelerate this oxidation process. 2. The simplest methods to check motor oil's expiration are: observing whether the oil's viscosity has changed, determining if the oil's odor has weakened, and examining if the oil's color has altered. When observing color changes, pay attention to variations in the oil's additives. Additionally, you can use filter paper or electronic instruments to check whether the motor oil has expired.