How long should each dry motoring attempt be for optimal performance?

The optimal duration for each dry motoring attempt is 30 seconds. This time frame is significant because it allows sufficient time to check the performance of the engine systems without risking overheating or causing undue stress to the components. During this 30-second period, the engine can effectively reach operational conditions necessary for assessing various parameters, such as oil pressure and fuel system integrity, while also ensuring that the starter motor does not overheat. Adhering to this recommended duration is crucial for maintaining the health of the engine and preventing any potential damage associated with prolonged attempts.