Can Semi-Synthetic Engine Oil Run for 9,000 Kilometers?
2 Answers
Semi-synthetic engine oil can run for 9,000 kilometers, but it should be noted that oil burning may occur. Semi-synthetic engine oil generally lasts for six months or 7,500 kilometers, and it needs to be replaced once the time is up. Semi-Synthetic Oil: Semi-synthetic oil is one type of automotive engine oil, with models including 5W30 and 5W40. It is a mixture of mineral oil and full synthetic oil in a ratio of 4:6, and its purity is very close to that of full synthetic oil. Engine oil is a substance enhanced with additives in base oil, mainly containing anti-wear additives, detergents, dispersants, and multi-viscosity index improvers. Main Functions of Engine Oil: The main functions of engine oil are to reduce friction and wear of moving parts, remove sludge and paint from the engine, neutralize acids produced by the oxidation of fuel and lubricant, and improve the sealing of piston rings.
The issue of semi-synthetic oil lasting for 9,000 kilometers actually depends on the specific vehicle model and personal driving habits. I've driven several cars myself, and in one of them, after using semi-synthetic oil for over 8,000 kilometers, I noticed the oil had thickened and the engine started making minor noises. Vehicle manuals typically recommend oil change intervals between 7,500 to 10,000 kilometers. However, frequent traffic jams in the city and lots of short trips can accelerate oil degradation, so it's best to check the dipstick to see if the oil's color and viscosity are normal. On the other hand, highway cruising is more suitable for extending the interval since the engine load is consistent and oil consumption is slower. If the car is over five years old with significant internal component wear, it's safer to change the oil earlier—don't save a little now only to face major engine repairs later. Regular maintenance protects engine lifespan, improves fuel efficiency, and ensures safety. I recommend noting the mileage after each oil change rather than relying solely on intuition.
