What is the shelf life of car engine oil?
2 Answers
Generally, the shelf life of engine oil varies among different manufacturers, but most are over 2 years, provided that the oil is unopened. If the oil has been opened, it is recommended to use it within half a year; otherwise, the oil may oxidize and deteriorate. Below is relevant information: 1. The simplest way to check the shelf life of car engine oil is to observe whether the viscosity of the oil has changed, determine if the smell of the oil has faded, and check if the color of the oil has altered. When observing changes in the oil's color, pay attention to changes in the additives within the oil. Additionally, filter paper or electronic instruments can be used to check whether the shelf life of the car engine oil has expired. 2. Engine oil is highly sensitive to moisture in the air, environmental temperature, and light. If exposed to air and strong light for a long time, it usually becomes ineffective. Using engine oil that has passed its shelf life can cause significant damage to the car's engine, such as poor lubrication and affected cooling effects.
The shelf life of motor oil is quite interesting, and I've learned a lot after driving several cars. Generally, unopened oil can last one to two years or even up to five years, depending on the type and quality. Synthetic oils tend to be more durable. However, once it's added to the car, it depends on how often you drive—oil should be changed every six months or every 5,000 to 7,000 kilometers to avoid expiration. Last time I delayed changing the oil, the engine noise increased, and upon inspection, it turned out there was excessive carbon buildup, costing me unnecessary repair expenses. Daily storage is also important—avoid hot or humid places like garages, as opened oil can absorb moisture and deteriorate. It's best to regularly check the oil dipstick for color and viscosity; if it turns black or shows impurities, change it immediately. Safety first—don't wait for problems to regret it later.