What Causes Engine Noise After an Oil Change?

1 Answers
Ruth
07/30/25 8:01am
Engine noise after an oil change can be attributed to the following reasons: Cold Start: During a cold start, the engine temperature is low, and the lubrication performance of the oil has not reached its optimal state. The engine increases its RPM to warm up faster, resulting in louder noise. Once the engine warms up, both the noise and RPM will decrease, which is a normal situation. Different Oil Type: If the car previously used high-viscosity oil and was later switched to low-viscosity oil, it can also lead to increased engine noise. After driving for some time, the noise will automatically reduce, which is also normal. Use of Poor-Quality Oil: Poor-quality oil has inferior performance in terms of anti-wear, cleaning, and lubrication protection. After adding such oil, the lubrication components are not effectively protected, leading to increased wear and noise. If not replaced promptly, it can severely damage the engine, necessitating major repairs.
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