What does an oil pressure gauge indicate?

An oil pressure gauge is designed to measure the pressure of the engine oil circulating within the engine. This pressure is critical because it indicates how well the oil is flowing through the engine components, ensuring that there is sufficient lubrication to prevent wear and damage. If the oil pressure is too low, it can lead to inadequate oil circulation, resulting in increased friction and potential engine failure. Conversely, if the pressure is too high, it could indicate a blockage in the oil passages or a malfunction in the oil pump.

The other options focus on different functions within the vehicle: the temperature of the engine coolant is monitored by a coolant temperature gauge, the level of fuel in the tank is checked by a fuel gauge, and the speed of the vehicle is indicated by a speedometer. Understanding the specific purpose of an oil pressure gauge helps in diagnosing potential issues related to engine lubrication and overall engine health.