How long can opened but unused engine oil be stored?
1 Answers
Opened but unused engine oil can be stored for 6 months to 1 year. Below are relevant introductions about engine oil: 1. Mineral oil: Mineral oil is the remaining oil after gasoline and heavy oil are extracted from petroleum. Mineral oil is actually a natural oil with relatively more impurities. It is cheaper compared to semi-synthetic and full-synthetic oils but provides poorer lubrication for the engine and has a shorter service life. 2. Semi-synthetic oil: Semi-synthetic oil is between mineral oil and full-synthetic oil. It contains a large amount of anti-corrosion additives to improve the oil's stability and high oxidation resistance. 3. Full-synthetic oil: Among these three types of engine oils, full-synthetic oil is the highest in quality and durability, and also the most expensive. Generally, it can be used in cars for 10,000 to 12,000 kilometers without deterioration.