How does an increase in oil pressure affect the angle of attack and RPM?

An increase in oil pressure typically correlates with enhanced lubrication and cooling within the engine, allowing it to operate more efficiently. As the engine runs more effectively, it can produce more power, which generally results in an increase in engine RPM (Revolutions Per Minute). This elevated RPM can allow the engine to produce greater thrust, thereby influencing the aircraft's performance characteristics.

Regarding the angle of attack (AOA), a higher oil pressure associated with increased RPM can lead to an improved airflow over the wings, thanks to the increased engine output and thrust. However, at a constant airspeed, pilots often find that the aircraft may not require as high an angle of attack to maintain level flight or to climb, particularly if there is a surplus of thrust due to the engine operating efficiently. Consequently, the increase in oil pressure and resultant RPM may lead to a decrease in the necessary angle of attack for continued flight or climb at a constant speed.

Thus, the correct choice indicates that an increase in oil pressure leads to a decrease in the angle of attack while simultaneously increasing the RPM of the engine. This relationship emphasizes the importance of oil pressure within the overall performance dynamics of a multi-engine aircraft.