Can you go 2 years without changing oil?

It is not recommended to go two consecutive years without changing a vehicle's engine oil, as this practice can cause irreversible damage to the engine. Conventional mineral oil needs to be changed every 5,000 kilometres or 6 months, semi-synthetic oil every 7,500 kilometres or 7-8 months, and fully synthetic oil can last up to 10,000 kilometres or 12 months. Even if the vehicle is driven very little, the oil will gradually lose its effectiveness due to oxidation and moisture absorption, especially in high-temperature and high-humidity climates where it deteriorates faster. Long-unreplaced oil will lose its lubricity, leading to increased carbon deposits inside the engine, abnormal wear of components, and even serious failures such as oil circuit blockages or cylinder scuffing. In addition, the oil filter must be replaced simultaneously with each oil change; otherwise, the performance of the new oil will deteriorate rapidly. If fully synthetic oil is used and the annual mileage is less than 10,000 kilometres, the interval can be extended to 12 months at most, but a two-year interval clearly exceeds the safety threshold. Regular maintenance not only avoids high repair costs but also ensures driving safety and the engine's service life.