When operating in cold weather, it’s better to not turn on the engine if it has not been warmed up before. The IO-520 may not even turn on when the temperature is below 3-4 °C (37-39 °F).
If you manage to make it start, you may damage it. The CHT would rise too much is a short period of time. Nevertheless, the oil would be too thick to lubricate the engine.
But…we have a solution for that!
The sim keeps crashing when I load my REP powered airplane
The crash is most likely caused by SASL. Some users reported SASL-related crashes on Windows 10 as well on El Capitan (see this post by Ben Supnik). To fix the problem you must update SASL to a newer version: Download
REP v2.0 is now out for the C210. The Bo is turning final!

the new version is now out. It’s a free upgrade for current users. See what’s new in V2.0.
F33A Bonanza Vs T210 Centurion
We are going to expand the REP saga to the Carenado’s F33A Bonanza. Why the Bonanza instead of the Baron, the C337, the brand new T182T or any other airplane? The choice for us was straightforward. You’ll find out that
REP Centurion How To: Descent and Landing
The third tutorial: how to land the REP Cessna Centurion. Learn how to do a proper descent and how to land at your destination safely.