oil temperature

Hi

Thanks - this thread has been helpful and highlighted a risk/concern.  I have a 912ULS with 45 hours accumulated over the past 9 months and 2 oil changes.  Climate is generally low humidity. Oil temp has always been around the 70C level.  I'm now concerned that over this period there is a risk of internal corrosion having taken place - any thoughts on the real risks and if so how to detect this?

Cheers

Andrew

For piece of mind, have the engine inspected by a Rotax agent. As this will come at some cost & inconvenience, I would just keep my fingers crossed, hope that there has been no damage & keep flying.

Focus on; finding a way to raise the oil temperature to a consistent 95C(+/- 5 degrees) in Cruise and over 100C in Climb-Out.

Bit of sheet aluminium, cut to fit, or air conditioners foil tape, or similar over your oil/coolant radiators, part blocking effective surface area, is a low cost, know to be effective method. Start with about 1/4 of the surface are covered - go fly, record temperatures (including OAT) decide to increase /reduce area covered.

Using sheet aluminium fabricate a partial cover over the exit air vent -  go fly, temperatures (including OAT) decide to increase /reduce area covered.Do this for summer & winter temperatures. Bit more time involved but will reduce future guess work - just use the appropriate vent cover for the season.

Purchase an oil thermostat. This is the high cost, complexity , weight increase, solution that works for many flying in low temperature environments.😈

Thanks Sean will give those a go

Thanks for all the input.  Through experimentation I have worked out the tape on the oil cooler to where I can keep my oil temps in the 190-220 range with ambient temps up to about 40F OAT.

CHT temps have been fairly consistent from warm to cold weather so no coolant radiator blocking applied.