What is the maximum oil pressure during start?

The maximum oil pressure during engine start is typically defined by the engine design and specifications provided by the manufacturer. In many cases, a value of 200 psi is a commonly seen maximum for oil pressure during startup, particularly in high-performance or heavy-duty engines. The reason for this higher pressure during startup is to ensure that sufficient lubrication reaches the engine components quickly, thereby reducing wear and the risk of damage. High oil pressure during startup compensates for the viscosity of oil, which can be thicker when cold, ensuring that it circulates efficiently through the engine.

This value can vary depending on the engine type, so it’s crucial for engineers and mechanics to refer to the specific engine's technical documentation. The other values typically represent pressures that might be seen under different operational conditions, not at startup. Therefore, selecting 200 psi reflects an understanding of the need for sufficient oil pressure to protect engine parts during the critical initial moments after engine engagement.