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One more thing - nowadays most of us have EDM 760's or 960's. They tell you what the CHT cooling rate is and it gives you an alarm if > 50 deg/min. If you are foolish enough to think you can descend at 195 KIAS and impress your friends then at least the monitor will let you know you are being very unkind to your engine. Much better to not let things get cold under the cowling. Also in winter in descent you can freeze the air/oil separator can that the TSIO's have or the breather tube and end up pressurizing the case, then blowing the seal, which has caused engine failures in many different types of acft. In acft that fly in colder conditions you often see this can and the breathing tubes insulated, with holes drilled or notches cut before the cowling interface to let liquid water out and minimize the chance of this happening. Keeping things nice and toasty with slower descent rates and proper engine management still however remains safe and smart.
So with the TSIO 360's, if you have the right engine monitoring equipment it is easier to ensure that the engines remain much more durable and dependable than in the olden days.
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