How Long Can Motor Oil Be Stored After Opening?

[SanAlyssa]

Motor oil can be stored for one year after opening, while unopened motor oil has a shelf life of five years. Once poured into the engine, the oil's shelf life is six months. Motor oil is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade viscosity index improvers. To prevent opened motor oil from deteriorating, the storage methods are as follows: 1. The storage environment for the oil bottle must be clean and dry, ensuring no sunlight exposure to prevent oxidation reactions in the oil; 2. After opening, the oil must be sealed immediately. After completing car maintenance, a clean plastic film should be wrapped around the bottle mouth, and the oil cap should be tightly screwed on.