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What is the shelf life of engine oil after opening?

1 Answers

BradyMarie

07/29/25 12:54pm

The shelf life of opened engine oil is about one year. Here are the methods for storing opened engine oil: 1. Storage environment for the engine oil bottle: It must be clean and dry, ensuring no sunlight exposure to prevent oxidation reactions in the oil. 2. After opening the engine oil: It must be sealed immediately. After completing car maintenance, a clean plastic film should be wrapped around the bottle mouth, and the cap should be tightened. 3. When adding the remaining oil from the last maintenance: Do not pour all of it into the engine; keep a portion. Generally, after long-term storage, there might be trace amounts of water at the bottom of the oil bottle. Adding this to the engine could have adverse effects and impact engine performance.

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