What are the methods to identify when to change engine oil?
1 Answers
Methods to identify when to change engine oil are: 1. Smell test: Pull out the dipstick and smell it closely. If there is a strong sour odor, it indicates the oil has deteriorated and needs to be changed; 2. Finger rub method: Rub the extracted old oil between your thumb and index finger repeatedly. If you feel impurities, poor viscosity, or even a gritty sensation, it needs to be changed; 3. Color identification method: Take a clean white filter paper, drop a few drops of old oil on it, and after the oil seeps through, if it appears deep blackish-brown with impurities, it needs to be changed. 4. Light inspection method: Pull out the dipstick and hold it at a 45-degree angle, observing the oil droplets under light. If there are many wear particles, it needs to be changed.