How many kilometers can semi-synthetic engine oil run?
2 Answers
Semi-synthetic engine oil is usually replaced every 7,500 kilometers or 7-8 months. Here is a detailed introduction about automotive semi-synthetic engine oil: 1. Overview: Semi-synthetic oil (Semi-Synthetic-Lubricant) is one type of automotive engine oil. It is made using semi-synthetic base oil, specifically: internationally classified Group III base oil, which is a refined product derived from mineral oil through hydro-cracking technology. 2. Others: The function of engine lubricating oil is to lubricate and clean the engine. It can be divided into three types: mineral oil, synthetic oil, and semi-synthetic oil. Semi-synthetic oil is a mixture of mineral engine oil and full synthetic engine oil in a ratio of 4:6.
I usually drive an older Japanese car, and if using semi-synthetic oil, it's generally safer to change it every 6,000 to 7,000 kilometers. It mainly depends on driving conditions: frequent traffic jams in the city lead to higher engine temperatures and faster oil degradation, so you should pay attention around 5,000 kilometers; if you drive more on highways, the oil performs better and can last up to 7,500 kilometers. Once, I didn't change it on time, and the oil turned black and thick, engine noise increased, and fuel consumption went up. Later, an inspection revealed carbon buildup, costing me a lot more in repairs. Regular maintenance can extend engine life—don't try to save small amounts of money. In hot weather, oil oxidizes faster, so change it a bit earlier; in cold weather, it lasts longer. Compared to full synthetic oil, semi-synthetic is cheaper but requires more frequent changes. I recommend following the manual's recommendations but being more conservative—don't exceed 8,000 kilometers to avoid issues. Regularly check the dipstick yourself; if the oil is dark or has impurities, it's a sign it's time for a change.
