What is the minimum oil level for proper engine function?

The minimum oil level for proper engine function is 75%. Having the oil at this level is crucial because it ensures adequate lubrication of engine components, which helps prevent wear and overheating. Oil plays a vital role in reducing friction between moving parts, maintaining optimal operating temperatures, and providing cleaning and protection against corrosion. If the oil level drops below this threshold, it can lead to insufficient lubrication, increased engine wear, and potential engine failure. Therefore, maintaining the oil level at or above 75% is essential for the reliable and efficient operation of the engine, particularly in high-performance systems like the MQ-9.