Oil Pressure Gauge
The engine oil pressure gauge indicates the pressure of the lubricating oil inside the engine. The average pressure ranges are between 6 pounds-per-square-inch (PSI) at 1000 RPM to 40 PSI or more at cruise-range speeds. A reading of pressure below 5 PSI at 1000 RPM may be caused by a low oil level
or other potentially serious problems that result in low oil pressure.
If you experience low oil pressure, stop your engine immediately and check your oil level before operating again.