What value stands on the red line on the oil temperature indicator?

What value stands on the red line on the oil temperature indicator?

• A. 245 °F
• B. 130 °F
• C. 200 °F
• D. 275 °F

Answer: (A)

The red line on the oil temperature indicator marks the maximum safe oil temperature. It serves as a warning threshold to prevent overheating, signaling the limit beyond which engine damage can occur. Normal operation sits below this line, in the typical operating range (well under the red line). For the Cessna 152, the red line is placed at 245°F, so when the gauge shows that level or approaches it, you should take action to cool the engine—reduce power, improve airflow, or check for cooling issues. Because the red line is at 245°F, that is the value represented by the red line.

The red line on the oil temperature indicator marks the maximum safe oil temperature. It serves as a warning threshold to prevent overheating, signaling the limit beyond which engine damage can occur. Normal operation sits below this line, in the typical operating range (well under the red line). For the Cessna 152, the red line is placed at 245°F, so when the gauge shows that level or approaches it, you should take action to cool the engine—reduce power, improve airflow, or check for cooling issues. Because the red line is at 245°F, that is the value represented by the red line.