What does the oil pressure gauge indicate?

The oil pressure gauge is an essential instrument that provides critical information about the engine's lubrication system. Specifically, it measures the engine oil pressure level, which is vital for ensuring that the engine components are adequately lubricated during operation. Proper oil pressure is necessary to maintain a film of oil between moving parts, preventing wear and overheating.

If the oil pressure is too low, it can lead to insufficient lubrication, which increases the risk of engine damage. Conversely, high oil pressure can also signal problems like blockages or excessive flow resistance. Therefore, maintaining the right oil pressure is key to the engine's health and performance, making this gauge crucial for pilots to monitor during flight.

The other options do not accurately reflect the function of the oil pressure gauge. For instance, while engine oil temperature is vital for overall engine health, it is indicated by a separate gauge. Likewise, the gauge does not measure the quantity of fuel in the oil or provide information about the oil filter’s status.