Why Does the Engine Noise Increase After Changing the Oil?

1 Answers
MayaAnn
07/29/25 9:48pm
There are several reasons why the engine noise may increase after an oil change: 1. The oil does not meet the standard or is overfilled: When the oil in the engine cylinder is too full, it creates unnecessary resistance to the crankshaft's rotation, affecting power output, increasing fuel consumption, and allowing more oil to enter the combustion chamber. This leads to increased carbon deposits in the combustion chamber, raising piston movement resistance and reducing engine power. 2. Choosing the right oil viscosity: It's essential to select the appropriate oil based on the engine and vehicle manual. 3. Carbon deposits: Moderate carbon buildup can affect performance because old oil becomes thinner with use, leading to more carbon deposits over time.
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