Oil temperature/engine warmup

I installed this oil temp regulator, fast warmup and perfect temperature control summer and winter.

https://www.aircraftspruce.com/catalog/eppages/xcomthermostat.php

I beleive the rpm limitatation based on oil temperature is to prevent the possibility of oil OVER pressurization which could blow-out the oil seals which would result in no oil pressure and damage engine.

Presumably you can monitor your oil pressure.  I think you are fine in gradually bumping up the rpm if/when you get stuck in the low 40s;  if the pressure shoots up to a "high" indication, that would be an indication that you are increasing rpm too fast.

However, I do think your in-flight temperatures should always be able to reach about 90º.  70º seems too low.  Perhaps there is something not quite right with your oil coolers?

As Garrett and Tyler stated, the limit is really the Oil Pressure, Not the Oil Temp or RPM.
It is just easier to say, "Don't rev up the engine until the Oil Hits 50°C than it is trying to explain what I am about to suggest.
Try this next time...

Let the engine heat up for a few minutes at idle.
Then advance the throttle until the Oil Pressure reaches 60-65psi.
Once it heats a lillte more and the Pressure drops to 55psi, Advance the Throttle to re-establish 60psi.
Repeat as needed.

You should be at 50°C+ in no time.
You should also notice that at 50°C+ you can no longer produce 60psi at any rpm. 

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<<< Inspite of taping over one (of the) of oil coolers... >>>
How many Oil Coolers do you have.???

<<< Inflight OT range 70° - 100°C >>>
That is a lot of Spread, Can be more specific???

Hi Bill,

Yours and previous comments make sense. Iam able to monitor oil pressure so will pay it more attention.

My setup has 2 oil coolers and the operating oil temperature range varies with engine load - climbing, cruising etc.

Regards, Mark