Can expired engine oil be used?
2 Answers
Expired engine oil cannot be used. Here is more information about engine oil: 1. Engine oil absorbs moisture, undergoes chemical and physical changes, reducing its lubrication, cooling, sealing, and anti-corrosion effects. Additionally, deteriorated engine oil can produce impurities that clog oil passages. 2. Engine oil serves to lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. 3. Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve any deficiencies in the base oil's performance, imparting new characteristics, making them an essential part of lubricating oil.
It's best not to use engine oil after its expiration date, as it may have deteriorated and lost its lubricating effect, which can wear down engine components over time. I once encountered a similar situation where the car's noise increased after starting, and upon inspection, it was found to be due to expired oil. It's recommended to regularly check the oil's expiration date, typically around one year; if stored improperly, its lifespan may be even shorter. Before replacing with new oil, check the oil level and quality: if it appears black or has thinned out, it should be replaced immediately. Developing good habits can extend your car's lifespan and avoid major repairs. Safety comes first when driving—don't risk big losses for small gains.
