What can cause reduced oil pressure in an engine?

Reduced oil pressure in an engine can occur when there is a clogged oil filter. The oil filter is designed to trap contaminants and debris from the engine oil to keep it clean and functioning effectively. When the filter becomes clogged, it restricts the flow of oil, leading to a drop in pressure. This can result in the engine not receiving sufficient lubrication, which can cause increased wear and potential damage to engine components.

Using synthetic oil generally does not cause reduced oil pressure; in fact, synthetic oils often provide better lubrication properties and can maintain their viscosity over a wider temperature range compared to conventional oils. High oil temperature can influence oil viscosity but does not directly cause reduced oil pressure unless it leads to oil degradation or vaporization. An engine running smoothly typically indicates that the oil system is functioning well and that oil pressure is likely normal.