Is Slight Shaking Normal After an Oil Change?

[Stephanie]

If the engine did not exhibit slight shaking before the oil change but starts to shake slightly after the oil change, this situation is abnormal. Reasons for car shaking after an oil change: 1. Oil Fill Level: If too much oil is added, the excess oil can easily enter the combustion chamber and form gummy carbon deposits. While there may be no obvious effects initially, over time, the carbon deposits will become increasingly severe, leading not only to idle shaking but also potentially clogging the catalytic converter, causing excessive exhaust emissions. In severe cases, it may even result in oil burning. 2. Oil Viscosity and Quality: It is crucial to choose oil that matches the vehicle model. If oil with excessively high viscosity is selected, it will inevitably affect the oil's flowability, which can cause engine shaking during idle. Additionally, the quality of the oil must be carefully considered. Low-quality oils often lack reliable quality assurance, which can not only lead to idle shaking but also directly impact the vehicle's overall performance.