Why Does the Engine Sound Louder After an Oil Change?

1 Answers
VonDaniela
07/25/25 3:15pm
The reasons for a louder engine sound after an oil change include: 1. The oil viscosity does not match, which can easily lead to carbon buildup, causing the engine noise to increase. 2. The main function of the exhaust pipe is to expel exhaust gases and reduce engine noise. If there is an issue with the exhaust pipe, the engine noise will definitely change. 3. There are more and more counterfeit oil products on the market, so car owners should pay attention to the quality of the oil when purchasing. 4. Excessive oil can create significant resistance, affecting power output, increasing fuel consumption and carbon buildup, reducing engine power, and causing excessive noise.
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