Why Does the Engine Noise Increase After an Oil Change?

[DeMadeline]

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.