What is the minimum oil capacity according to the Sky Warrior policy?

The minimum oil capacity according to the Sky Warrior policy is specified to ensure proper engine lubrication and performance. A capacity of 4.5 quarts is crucial because it provides an adequate oil reservoir for effective engine operation, accounting for factors such as oil consumption during flight and ensuring that there is enough oil to maintain proper pressure and temperature. This amount helps prevent engine wear and overheating, maximizing reliability and efficiency. It's a balance between having enough oil to maintain the needed lubrication without excessive weight from carrying an overly large oil supply. Thus, 4.5 quarts is established as the minimum to support these operational requirements safely.