How Long is the Shelf Life of Engine Oil?

[Ricky]

According to national regulations, the shelf life of engine oil is 5 years, while some types can last up to 12 years. Generally, engine oil within 3 years should be fine. Unlike food or medicine, the General Administration of Quality Supervision has stipulated that products with a shelf life exceeding a certain number of years do not need to indicate their expiration date, which is why engine oil often lacks a labeled shelf life. Engine oil, also known as motor lubricant, serves multiple functions for the engine, including lubrication, reducing friction, aiding in cooling, sealing against leaks, preventing rust and corrosion, and acting as a shock absorber. Engine oil consists of two main components: base oil and additives. The base oil is the primary constituent, determining the fundamental properties of the lubricant, while additives are used to compensate for and enhance any deficiencies in the base oil's performance, providing new characteristics and making them a crucial part of the lubricant.