When Should Engine Oil Be Changed?

[LeEden]

Car engine oil change intervals vary depending on the type of oil used: 1. Fully synthetic oil should be changed every 10,000 kilometers or once a year; 2. Semi-synthetic oil should be changed every 7,500 kilometers or every 7 to 8 months; 3. Mineral oil should be changed every 5,000 kilometers or every 6 months. The consequences of not changing the oil for an extended period include: 1. The oil becomes ineffective and deteriorates, increasing wear and damage to engine components; 2. The sealing effect is reduced, causing the oil to become watery and lose its sealing function; 3. The cooling effect is diminished; 4. Sediment and impurities can corrode internal engine parts; 5. The lubrication performance of bearings and the lubrication and cooling functions of mechanical transmission parts are lost, affecting the vehicle's optimal driving condition; 6. The engine may be damaged; 7. Sludge can form, leading to engine failure.