How Long Can Engine Oil Be Stored in a Car Exposed to Sunlight?

[AdelynLee]

Engine oil should not be exposed to sunlight. Once opened, it can be stored for about a year. Here are the relevant details: 1. Storage Conditions: The storage environment for engine oil bottles must be clean and dry, ensuring no exposure to sunlight to prevent oxidation of the oil inside. After opening, the oil must be sealed immediately. After completing car maintenance, cover the bottle mouth with a clean plastic film and tighten the cap. When adding leftover oil from previous maintenance, do not pour all of it into the engine; retain a portion. Over time, a small amount of moisture may accumulate at the bottom of the oil bottle, which could adversely affect engine performance if added. 2. Shelf Life: Unopened engine oil stored in a cool place can last at least five years. Once opened, the shelf life is typically 6-9 months, but this depends on actual storage conditions.