What is the minimum oil temperature required to accelerate to climb thrust or higher?

• A. 5 C
• B. 10 C
• C. 15 C
• D. 20 C

Answer: (C)

Oil temperature governs how quickly and reliably the engine’s lubrication and hydraulic systems respond, which in turn affects fuel metering and throttle response. When oil is too cold, its viscosity is high, so oil pressure and actuator movement can be sluggish, and the engine control system may not allow full thrust smoothly. Reaching at least 15 C ensures the oil is thin enough to provide proper lubrication and hydraulic performance, enabling a clean and reliable acceleration to climb thrust or higher. Temperatures below that threshold risk insufficient lubrication and control authority, while 15 C is the minimum that permits the required thrust rise.