When Should Engine Oil Be Changed?
1 Answers
It is recommended to change conventional engine oil every 4,000-5,000 kilometers, semi-synthetic oil every 6,000-7,500 kilometers, and full-synthetic oil every 8,000-10,000 kilometers. Here is more relevant information: 1. Function of Engine Oil: Engine oil, also known as engine lubricant, serves multiple purposes such as lubrication and wear reduction, auxiliary cooling, sealing and leak prevention, rust and corrosion protection, and shock absorption. It is often referred to as the "blood" of a car. Engine oil consists of base oil and additives. The base oil is the primary component of lubricants and determines their fundamental properties. 2. Methods to Identify Engine Oil Condition: (1) Smell Test: Pull out the dipstick and smell it. If there is a strong sour or foul odor, it indicates the oil has deteriorated and should be changed. (2) Rub Test: Take some old oil and rub it between your thumb and forefinger repeatedly. Good-quality oil will feel smooth, produce little residue, and have no gritty sensation. If you feel impurities, poor viscosity, or even a rough texture, it should be replaced. (3) Color Test: Place a few drops of old oil on a clean white filter paper (or high-quality tissue paper). After the oil spreads, good-quality oil will leave no powder, feel dry and smooth to the touch, and show a clear yellow stain. If the oil appears dark brown or black and contains impurities, it should be changed. (4) Light Test: Hold the dipstick at a 45-degree angle and observe the oil droplets under light. If no metal particles are visible, the oil is in good condition. If there are many particles, it should be replaced.
