How Long is the Shelf Life of Motor Oil After Opening?

[LeAaliyah]

Opened motor oil has a shelf life of approximately one year. To prevent the opened motor oil from deteriorating, proper storage methods should be followed: 1. The storage environment for the oil bottle must be clean and dry, ensuring no exposure to sunlight to prevent oxidation reactions in the oil. 2. After opening, the motor oil must be sealed immediately. After completing car maintenance, a clean plastic film should be placed over the bottle opening, and the cap should be tightly screwed on. 3. When adding the remaining oil from the previous maintenance, do not pour all of it into the engine; retain a portion. This is because prolonged storage can lead to trace amounts of water at the bottom of the oil bottle, which, if added to the engine, could have adverse effects and impact engine performance.