What is the oil pressure after 10 minutes in an assisted air start?

• A. 95 PSI
• B. 182 PSI
• C. 150 PSI
• D. 140 PSI

Answer: (A)

When an assisted air start is completed, the engine is brought up to speed with external air and then runs under its own oil-lubrication system. As the engine warms, the oil becomes less viscous and the oil pump pressure settles into the normal operating range. After about 10 minutes, the engine should show a steady oil pressure in the mid-90s psi, which indicates the lubrication system is functioning properly at operating temperature. This value is consistent with normal operation; readings significantly higher would point to an overpressure condition or valve issues, while readings much lower could indicate lubrication problems. So, about 95 psi is the expected indication after 10 minutes.