What Causes Idle Vibration After an Oil Change?
2 Answers
The reasons for idle vibration after an oil change are: 1. Oil dripping onto the oxygen sensor; 2. Adding unsuitable oil. The functions of oil are: 1. Lubrication; 2. Assisting in cooling; 3. Cleaning; 4. Sealing and preventing leaks; 5. Rust and corrosion prevention; 6. Shock absorption and cushioning, reducing wear. Oil, also known as engine lubricant, is composed of base oil and additives. Oil can be categorized by viscosity into: 1. Four-stroke oil; 2. Two-stroke oil. Oil selection based on usage conditions can be divided into: 1. Diesel engine oil: Chosen based on the combined mechanical and thermal load of the car engine and the severity of engine conditions; 2. Gasoline engine oil: Selected according to the severity of engine conditions, additional equipment in the car's intake and exhaust systems, and the production year.
After my last oil change, the car started shaking when parked, and the engine sound became unstable, which really worried me. I thought it might be an oil issue, like incorrect viscosity, using the wrong brand or type, causing the engine to shake due to incompatibility. Later, when I took it to the shop for inspection, it turned out the spark plugs were worn out, and the system restart during the oil change exposed this hidden problem. Too much or too little oil can also cause this because unstable oil pressure affects idle operation. My advice is to first check yourself: pull out the dipstick to see if the oil level is within the marked lines and adjust the oil quantity according to the car manual. If the shaking continues, it might not be directly related to the oil but could be due to issues like faulty ignition coils or carbon buildup in the throttle body. Don’t delay—get professional repairs immediately. This shaking affects driving comfort, increases fuel consumption over time, and can lead to more severe engine damage.
