What Causes Excessive Car Noise?

[OAriel]

Reasons for excessive car noise: 1. Aging or loosening of engine mounts, which are rubber blocks between the engine and the frame. When these mounts age or loosen, the engine will vibrate, and the faster the speed, the louder the vibration noise. Tightening or replacing the engine mounts is necessary; 2. If the engine oil viscosity does not match the engine, it is easy to produce carbon deposits, leading to increased engine noise; 3. Engine misfire, mainly referring to one or more cylinders not working properly, usually manifested by obvious intermittent exhaust flow and severe shaking of the exhaust pipe, with a clear "thumping" or "popping" sound from the engine.