What is normal oil pressure when engine is idle?

Normal oil pressure when an engine is idle typically ranges from 20 to 30 psi (pounds per square inch) for most vehicles. However, this can vary depending on the specific make and model of the engine, as well as the oil viscosity used. It's important to refer to the vehicle's owner manual for the manufacturer's recommended oil pressure specifications. Low oil pressure at idle may indicate potential issues, such as low oil levels or a failing oil pump.