What is the minimum oil temperature before setting power for takeoff?

• A. 15C
• B. 0C
• C. 25C
• D. -5C

Answer: (A)

Oil temperature shows when the lubrication system is ready for high-power operation. At takeoff, the engine loads up quickly and the oil must flow readily to form a stable film on bearings and gears. If you advance to takeoff power while the oil is still cold, it’s thick and may not circulate quickly enough, increasing wear and the chance of excessive stress on moving parts during this demanding phase. Waiting for the oil to reach the minimum threshold allows the oil to circulate properly and protect components as power is applied. For the PC-12 NGX, that minimum is 15°C. If the oil is colder than that, hold off on takeoff power; once it reaches 15°C or higher, takeoff can be started safely. Lower temperatures would risk insufficient lubrication, while waiting to reach a higher temperature (like 25°C) isn’t required for this minimum.