How Long Does Motor Oil Generally Expire?
1 Answers
Under unopened conditions, motor oil generally expires in 5 years, while oil poured into the engine expires in half a year. Additionally, leftover oil after maintenance expires in 1 year. Below is relevant information about automotive motor oil: 1. Function of motor oil: Motor oil lubricates and reduces friction in the engine, assists in cooling, seals against leaks, prevents rust and corrosion, and provides shock absorption. It is hailed as the 'blood' of a car. 2. Composition of motor oil: Motor oil consists of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties, while additives compensate for and improve the shortcomings of the base oil, imparting new properties. Additives are also an important part of lubricating oil. 3. Classification of motor oil: Based on the base oil, motor oil on the market can be simply divided into mineral oil and synthetic oil (vegetable oil is not included due to its scarcity). Synthetic oil is further divided into full synthetic and semi-synthetic.