At idle, what is the minimum oil pressure required?

The correct minimum oil pressure required at idle is 25 psi. This threshold is important because adequate oil pressure is essential for ensuring proper lubrication of engine components. Sufficient oil pressure helps maintain a thin film of oil between moving parts, reducing friction and wear, and preventing overheating.

Staying at or above this minimum oil pressure at idle indicates that the oil pump is sufficiently circulating oil to protect the engine. If the pressure were to drop below this level, it could suggest issues such as a failing oil pump, insufficient oil levels, or excessive wear in the engine, potentially leading to engine damage over time. Therefore, having a minimum oil pressure of 25 psi is crucial for maintaining engine health and performance.