Can expired engine oil still be used?
1 Answers
Expired engine oil cannot be used. Engine oil absorbs moisture, undergoes chemical and physical changes, which reduces its lubrication, cooling, sealing, and anti-corrosion properties. Additionally, deteriorated oil can produce impurities that clog oil passages. Deteriorated oil not only fails to provide anti-corrosion protection but also accelerates component oxidation due to the absorbed moisture. Methods for storing opened engine oil: 1. Seal immediately after opening. After maintenance at a 4S shop or repair shop, immediately tighten the oil bottle cap; 2. After sealing the oil bottle, store it in a dry and cool place, ensuring it is not exposed to sunlight to prevent oxidation of the oil inside; 3. When using stored oil for the next maintenance, do not pour all of it into the engine; retain a small portion.