What is the oil pressure after 10 minutes for a windmill start?

• A. 95 PSI
• B. 182 PSI
• C. 140 PSI
• D. 100 PSI

Answer: (A)

Oil pressure during a windmill start rises as the engine begins to turn and the oil warms, then settles once the system reaches normal operating temperature. After about ten minutes of windmilling, the lubrication circuit has warmed and the pressure is held at the nominal level by the pump and relief valve. In this scenario that nominal value is around 95 PSI, reflecting a steady, warm engine ready to operate within its standard lubrication range.

Readings like 182 PSI would be well above the normal limit and point to an overpressure condition or a faulty gauge, while 140 PSI is higher than typical warm-up pressure for this start, and 100 PSI, while plausible, is not the specified warm-up target here. So the expected reading after ten minutes is 95 PSI.