How Often Should You Change the Oil If You Don't Drive for a Long Time?
2 Answers
If you don't drive for a long time, you should change the oil every six to eight months. Oil left in the engine oil pan for an extended period can oxidize and deteriorate. Oil is often referred to as the lifeblood of the engine, as it plays crucial roles in lubrication, cleaning, sealing, heat dissipation, buffering, and rust prevention. Without oil, the engine cannot function properly. There are three types of engine oil: full synthetic oil, semi-synthetic oil, and mineral oil. Full synthetic oil offers superior lubrication performance and a longer service life. Engine oil consists of base oil and additives, with common additives including dispersants and antioxidants. While the base oils used by different brands are generally similar, the key difference lies in the formulation of the additives, which represents the core technology of oil manufacturers.
To be honest, I've studied car maintenance for many years and always delve into the causes of such issues. When a car sits idle for extended periods, the engine oil does deteriorate due to oxidation. Moisture and contaminants from the air mix into the oil, reducing its viscosity and increasing acidity, which compromises its lubrication and protective properties. Even if the car isn't driven, regular oil changes are essential. Generally, I recommend changing the oil every 6 to 12 months as a safe practice—this depends on the oil type and environment. If you live in a humid area, changing within 6 months is better, while drier climates may allow up to 12 months. Importantly, don’t forget to check the oil quality and level. For instance, if the dipstick shows darkened oil or a burnt smell, it’s time for a change. For vehicles parked long-term, degraded oil accelerates internal engine rust and wear. Proactive maintenance avoids costly overhauls and extends engine life. Sticking to this routine ensures peace of mind and savings in the long run.
