What to Do When Engine Noise Increases After an Oil Change?

[AndrewLynn]

Increased engine noise after an oil change is a common issue, often caused by overfilling the engine oil. This can lead to greater resistance during crankshaft rotation, resulting in reduced engine power and altered air-fuel ratios in the combustion chamber, which increases the likelihood of knocking and consequently raises noise levels. Here’s some relevant information about engine oil: 1. Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), has a density of approximately 0.91×10³ (kg/m³). It serves multiple functions such as lubrication and wear reduction, aiding in cooling, sealing against leaks, preventing rust and corrosion, and acting as a shock absorber. It is often referred to as the "blood" of a car. 2. Composition: Engine oil consists of two main components: base oil and additives. The base oil is the primary constituent of lubricants, determining their fundamental properties, while additives are used to compensate for and enhance the performance shortcomings of the base oil, providing additional beneficial properties. Additives are a crucial part of lubricants.