How to Determine the Quality of Engine Oil?
2 Answers
Methods to determine the quality of engine oil include: 1. Inspecting the packaging of the oil; 2. Checking the seal of the oil container; 3. Differentiating based on the color of the oil; 4. Distinguishing by the smell of the oil; 5. Verifying the anti-counterfeit label. The functions of engine oil are: 1. Lubrication and friction reduction; 2. Assisting in cooling and temperature reduction; 3. Sealing and preventing leaks; 4. Rust and corrosion prevention; 5. Shock absorption and cushioning. The method for changing engine oil is: 1. Lift the vehicle, remove the underguard, and place a container of about 10 liters under the oil drain plug; 2. Unscrew the oil drain plug, use an air gun to blow into the oil filler port for two minutes, tighten the oil drain plug after draining, and wipe with a tissue to check for leaks; 3. Reinstall the underguard, lower the vehicle, and use a funnel to add oil through the filler port.
To judge whether engine oil is good or not, the most practical methods are to observe its color, feel its viscosity, and smell its odor. New engine oil is bright yellow, as clear as honey; if it turns black or slightly gray, it indicates prolonged use with accumulated contaminants; if the color becomes milky white, resembling milk, it might be contaminated with water and requires immediate attention. Feel its texture: dip a clean finger into the oil and rub it—if it feels sticky and slightly slippery, it's normal; if it becomes thin or has a gritty sensation, it may contain excessive impurities. Smell it: normal oil has little to no odor; if there's a burnt smell or gasoline odor, it suggests issues in the engine, such as overly rich fuel mixture or excessive temperature. I check it every 5,000 kilometers to detect problems early, preventing minor issues from escalating, saving both money and hassle. The maintenance manual recommends changing the oil every six months, but actual intervals depend on driving habits—frequent city traffic congestion can cause the oil to get dirty faster.
