What is the minimum starting oil temperature for the King Air 350?

The minimum starting oil temperature for the King Air 350 is -40°C. This limitation is crucial because starting the engine when the oil is too cold can lead to increased wear and tear, as well as potential engine damage due to inadequate lubrication. At lower temperatures, the oil becomes more viscous, making it less effective at lubricating the engine components. The specified minimum temperature ensures that the oil has reached an acceptable viscosity to provide proper lubrication and minimize engine wear during the start-up process.

While other temperatures indicated in the options might seem reasonable, they do not align with the specific requirements outlined in the aircraft's operating limitations. Therefore, adhering to the -40°C minimum ensures safe and efficient engine operation from the very start.