How Long Can Engine Oil Be Stored?

1 Answers
StDaniel
07/30/25 3:36am
Generally speaking, unopened engine oil has a shelf life of about five years. The storage period for used oil after sealing varies depending on its type: mineral oil can typically be stored for 6 months; semi-synthetic oil can be stored for 9 months; and full synthetic oil can be stored for 12 months or even longer. Here are the storage methods for opened engine oil: 1. Ensure the storage environment for the oil bottle is clean and dry, and make sure there is no sunlight exposure to prevent oxidation reactions in the oil. 2. The oil must be sealed immediately after opening. After completing car maintenance, you should promptly cover the bottle mouth with a clean plastic film and tighten the oil bottle cap.
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