The fear in high oil temps is the loss of the indium overlay on the rotor bearings. The oil also controls rotor face temps by cooling the rotors. But the oil temp on the gage is lower than the highest oil temps that appear in the oil wedge on the rotor bearings. So what is that when the gage says 230 degrees? I don't know.

My limited understanding was/is that the fear in high oil temps was permanent set in the side seals.  Didn’t get the pan oil temp for the lack of ‘paging’ of the monitor screen. The oil pressure was about 85 psi. t sort of alloy of indium is used on the bearings?

You can reduce oil temps by limiting throttle settings. A slight reduction can make a big difference. Also reduced ignition advance and richer mixture settings help.

The mixture during full power climb was lean – O₂ sensor at the bottom of the scale.  The pilot didn’t recognize the need to tweak the mixture knob, and the MAP was a bit higher (~1” hg) then I had ever seen on static due to the dynamic pressure of the ram induction scoop.

Al