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How often should engine oil be changed if the car is not used for a long time?

1 Answers

OCamilla

07/30/25 10:50am

If the car has been parked for as long as half a year, it is best to change the engine oil immediately before driving to ensure the engine operates in the best condition. When a vehicle is parked for an extended period, the engine oil can deteriorate due to oxidation, leading to reduced performance. It is crucial not to continue using degraded oil to save money. Additional Information: 1. First, it's important to know that engine oil is categorized into mineral oil and synthetic oil. Synthetic oil is further divided into full synthetic oil and semi-synthetic oil. The shelf life of mineral oil is 3 months, semi-synthetic oil is 6 months, and full synthetic oil can last up to 1 year. 2. Even full synthetic oil with a shelf life of 1 year will experience performance degradation after half a year. 3. Therefore, in daily car usage, apart from considering the mileage to determine if the oil needs to be changed, the duration of oil use should also be noted. For specific models, refer to the vehicle's maintenance manual for the exact mileage and duration, and follow the mileage and time specified in the manual.

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