What does the engine oil pressure gauge indicate?

The engine oil pressure gauge indicates the pressure of oil being delivered to the engine's various components. This measurement is crucial for maintaining proper engine operation and ensuring that all parts receive adequate lubrication. Proper oil pressure ensures that the oil can effectively flow to critical areas, reducing friction and wear, which ultimately prolongs the life of the engine. High or low readings on this gauge can signal issues that require immediate attention, such as leaks, pump failures, or blockages, which can lead to engine damage if not addressed.

The other options do not accurately describe the function of the oil pressure gauge. It does not measure the oil level, temperature, or the amount of oil dispersed, but rather focuses solely on the pressure of the oil supply system.