How to Determine When Engine Oil Needs Changing
2 Answers
There are four methods to determine engine oil condition: 1. Smell Test: Pull out the dipstick and smell it closely. If there's a strong sour odor, it indicates the oil has deteriorated and should be changed. 2. Finger Rub Test: Rub the extracted old oil between your thumb and index finger repeatedly. Good quality oil will feel lubricated with minimal grit and no friction. If you feel impurities, poor viscosity, or even grittiness, it should be changed. 3. Color Identification Method: Place a few drops of old oil on a clean white filter paper (or high-quality tissue). After absorption, good oil leaves no powder, feels dry and smooth to touch, and shows clear yellow staining. If it appears dark brown with impurities, change is needed. 4. Light Inspection Method: Hold the dipstick at a 45-degree angle under light. Good oil will show no visible particles in the droplets. If numerous particles are visible, replacement is required.
Through my daily driving experience, I've gathered some insights on when to change the engine oil. Firstly, check the mileage – for family cars, it's generally recommended to change every 8,000 to 10,000 kilometers, but this isn't an absolute rule. Secondly, consider the time factor. Oil degrades over time due to oxidation, so even with low mileage, it's best to change it every six months. I always check the dipstick: pull it out, wipe it clean, reinsert it, and if the oil is pitch black or sticky with particles, it's time for a change. Smelling the oil is also crucial – fresh oil has a mild, oily scent, while any strange odors like gasoline or a burnt smell indicate potential degradation. Increased engine noise or vibrations during operation can also signal that the oil has aged and lacks proper lubrication. I've made it a habit to do a quick check every month, which keeps my mind at ease and prevents potential issues. Delaying an oil change can lead to engine overheating and damage – I learned this the hard way once, wasting money on unnecessary repairs. Regular oil changes ensure smoother driving, better fuel efficiency, and improved performance. Following the manual's recommendations is the safest approach, but it's also important to adapt based on actual conditions.
