Can Expired Engine Oil Still Be Used?

1 Answers
GenevieveLee
07/25/25 1:25pm
Expired engine oil cannot be used. Adding deteriorated oil to a vehicle can cause damage. Below is expanded information about engine oil: 1. Types: Engine oil is divided into three categories: full synthetic oil, semi-synthetic oil, and mineral oil. 2. Oil Specifications: Oil packaging displays codes such as 5w30, 0w20, and 5w40, which indicate the oil's specifications. 'W' stands for 'Winter,' meaning the oil can be used in winter if it has this letter. 3. Consequences of Insufficient Oil: When oil is insufficient, it leads to poor lubrication on the friction surfaces of engine components. Poor lubrication increases wear and tear on parts. Additionally, oil plays a critical role in cooling and heat dissipation. Insufficient oil reduces the engine's cooling capacity, leading to overheating, which can cause bearing corrosion, cylinder scoring, and other issues.
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