Maximum oil temperature (for any duration of time) is what temperature?

• A. 140 C
• B. 150 C
• C. 155 C
• D. 165 C

Answer: (C)

Oil temperature has a hard redline that must never be exceeded at any time, because once the oil gets too hot its viscosity and protective additives break down, leading to increased wear and potential engine damage. The maximum oil temperature allowed at any time is 155 C, so that value is the correct limit. Lower values like 140 C or 150 C are within limits but not the absolute maximum, while 165 C would exceed the redline and require immediate corrective action.