How Long Can Opened Engine Oil Be Stored?

[RemingtonLee]

Opened engine oil can be stored for six months to one year. Below are the relevant details: 1. Shelf life of unopened engine oil is about 5 years: Generally, unopened engine oil has a shelf life of approximately 5 years, while opened engine oil's shelf life is significantly shortened, typically lasting only 1 year. Once opened, engine oil tends to absorb moisture from the air, accelerating oxidation and deterioration. Normal engine oil has a water content below 0.03%. When the water content exceeds 0.1%, the additives in the oil will become ineffective, leading to oil degradation. 2. Gasoline engine oil cannot be used in diesel engines: Specialized gasoline engine oil should not be substituted for diesel engine oil, as this may accelerate wear in diesel engines. Gasoline engine oil and diesel engine oil should, in principle, be used separately. Only when the vehicle manufacturer provides substitution instructions or labels the oil as suitable for both gasoline and diesel engines can it be used interchangeably or within the specified grade range.