Oil Pressure - What Does It Do - Why Do You Need It
Oil Pressure – What Does It Do – Why Do You Need It

Oil pressure plays an important role in making sure that oil reach the areas it needs to. This helps reduce the wear of engine parts.

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When checking the oil pressure gauge, keep in mind that the pressure reads higher in cold weather. Consequently,  due to the higher thickness (also known as viscosity) of the oil.

A customer changes their brand of oil and then complains of low pressure. Is this perception or reality and is low pressure inherently bad, why don’t customers complain about high pressure? Customers who change brand and experience an increase in pressure usually show delight, when in fact they should show concern. As pressure is resistance to flow, an engine with wide oil galleries and using a low viscosity oil will have a faster flow rate and lower pressure, a very desirable condition for minimising wear.

Conversely, an engine with smaller galleries and a higher viscosity oil will have less oil flow and a higher pressure, resulting in less efficient lubrication. In extreme cases, the oil would never get to the critical parts to do its job. Consequently,  In some instances the oil would ‘by pass’ through a valve fitted to most engines. As a result, Allowing the oil to return to the sump, reducing the amount of oil getting to the those moving parts.