What value is shown on the red line of the oil pressure indicator?

What value is shown on the red line of the oil pressure indicator?

• A. 25 psi
• B. 60 psi
• C. 100 psi
• D. 90 psi

Answer: (C)

Oil pressure gauges use colored ranges to indicate safe limits. The green band shows normal operation, while a red warning line marks the maximum safe pressure. On this instrument the scale extends to 100 psi, and the red line sits at that top end. So the value indicated by the red line is 100 psi. In normal warm operation, oil pressure sits lower in the green range (roughly in the mid-50s to mid-90s psi); reaching the red line means you’re at the upper limit and should monitor the engine.

Oil pressure gauges use colored ranges to indicate safe limits. The green band shows normal operation, while a red warning line marks the maximum safe pressure. On this instrument the scale extends to 100 psi, and the red line sits at that top end. So the value indicated by the red line is 100 psi. In normal warm operation, oil pressure sits lower in the green range (roughly in the mid-50s to mid-90s psi); reaching the red line means you’re at the upper limit and should monitor the engine.