Can semi-synthetic oil be used for 10,000 kilometers?
2 Answers
Semi-synthetic oil cannot be used for 10,000 kilometers; it needs to be replaced after 7,500 kilometers. Semi-synthetic oil is a lubricant made from semi-synthetic base oil and international Group III base oil. It is a product refined from mineral oil through hydrocracking technology, consisting of a 4:6 mixture of mineral oil and full synthetic oil. The purity of semi-synthetic oil is close to that of full synthetic oil. The method for replacing semi-synthetic oil is as follows: 1. Place an old oil container under the oil pan and locate the oil pan's drain plug; 2. Loosen the drain plug, move the oil container under the oil filter, and use an oil filter wrench to loosen the filter; 3. Unscrew the filter by hand; 4. Use a funnel to pour in new oil to prevent spilling oil on the exterior of the engine.
Semi-synthetic engine oil usually can't last up to 10,000 kilometers, and I've had quite a bit of personal experience with this. I remember last time when I was driving my old car with semi-synthetic oil for about 8,000 kilometers, I noticed the engine noise became louder. When I took it for inspection, the oil quality had already deteriorated, nearly damaging the engine. Most semi-synthetic oils are designed to last between 5,000 to 7,500 kilometers because the additives in the oil gradually deplete, especially under conditions like high-speed driving or frequent traffic jams, which accelerate wear. I recommend changing it every 6,000 kilometers or so—don't skimp on this expense. If you're unsure, buy an oil test strip to check the color; if it turns black, it's time for a change. Never try to save money by pushing it on long trips, as you might end up with costly engine repairs—penny-wise but pound-foolish. Regular maintenance helps you avoid unnecessary expenses and keeps your beloved car running smoothly.