LEFT engine is unhapppy - unless pilot manages it properly. Don't worry, I won't fail them immediately at the slightest redline crossing, but the redlines (and other less obvious limits, not present in X-Plane, but calculated by Gizmo) do matter and have to be respected. The more you abuse the engine, the less time you have before failure occurs. You could get away for minutes with a slight mismanagement, but a big pull on a wrong lever at the wrong time will tear the engine apart in a matter of seconds. The more power - the more strict the limits become, so if manual says "takeoff power limit: 1 minute", then it would be a good idea to respect that remark! Having said that, the plane is a joy to fly, as long as you fly it by the rules, which will be outlined in the manual Oil shutters are separate devices, that regulate the airflow through oil coolers and work independently of cowl flaps. If you see the oil temperature going over or under the limits and cowl flaps already are full close/open, then it's time to adjust the shutters. 0.5 is a temporary setting, suitable for most "normal" temperature conditions, but you will need to close them on cold winter days. Both cylinder head temperatures and oil temperatures are linked to failures system, so you'd better watch them all closely, from startup to shutdown. Both engines are modelled separately, which applies to performance overrides and monitoring, failure triggers, oil shutters and some other cool effects and features, that are still under construction (they do work already, but need some fine tuning). Flight model and engine modelling features, that already work and have been checked, are between 95-99% true to the real plane (the difference is only visible in the numbers on specific test flights, you won't notice it during normal flying).