Why Does the Engine Noise Increase After an Oil Change?
2 Answers
There are several reasons why engine noise may increase after an oil change: 1. Overfilling of engine oil: When there is too much oil in the engine, it creates unnecessary resistance to the rotation of the crankshaft, affecting power output, increasing fuel consumption, and consequently raising noise levels. 2. Unsuitable oil viscosity: If the oil viscosity is too high, it creates greater rotational resistance when the engine is cold, leading to insufficient lubrication and increased noise during cold starts. 3. Severe engine carbon buildup: Over time, engine oil becomes thinner, and carbon deposits accumulate. When new oil is first added, the engine may not immediately adapt to the oil's viscosity, resulting in increased engine noise.
I just changed the engine oil and noticed that the engine noise is louder than before. The first thing that comes to mind is that I might have used the wrong oil. If the oil viscosity is too thin or too thick, such as using a grade that doesn't meet the vehicle's requirements, it can lead to insufficient lubrication, increased friction, and naturally louder noise. Additionally, if the oil level is too low or too high, it can affect the oil pump's operation and may also cause unusual noises. Don't forget to check if the oil filter is properly tightened; a loose filter can allow air to mix into the oil passages, or using low-quality oil can result in poor lubrication. After an oil change, it's best to start the engine for a few minutes to let the new oil lubricate the internal components. However, if the noise persists, you should check the oil dipstick or return to the repair shop for inspection. Don't delay to prevent engine damage.
