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I'm starting to like the oil cooler theory. My question is, what type of oil was used? Straight weight or multi-viscosity synthetic oil? Personally, I only use synthetic oil and it makes a big difference how fast the oil pressure rises on a very cold day.
I also find it rather odd that the operator and maintenance manuals don’t establish a cold weather limitation…they both generally discuss colder weather starting procedures. There is an option for an oil dilution system, but that is for starting during cold weather and not while operating at altitude. The operator's manual says to watch engine temps during a cold weather descent…i.e, don’t chop the throttle. But the big paradox is I remember seeing optional cold weather plates the restrict airflow thru the front cowl and also out the rear cowl…but can’t find any info about it in either the operator or maintenance manual. It makes me wonder if Cessna really didn’t even want to mention cold weather flying for some reason.
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