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My graybeard mechanic who has tons of hands on
experience said that since the development of modern oil like Aeroshell 15-50
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excessive cylinder wear has become a thing of the
past. These oils are that much better. I assume competitive products
are similar.
I always let my engine warm up before
takeoff. 100 deg. oil minimum. Many times I wave other planes ahead
of me when number one.
Oil effectiveness is one issue but I think thermal
stress is of even more importance. Some pilots baby their engines in the
air being careful to move the throttle slowly and never transition the airspeed
too quickly. Consider the stress when you cob in full power on a cold
engine. There is little or no airflow yet and the flow of cooling oil
is minimal. The rapid heating will distort cylinders and change
tolerances.
The Lycoming book says that if the engine responds
to advancing throttle smoothly it's warm enough to go.
Like other engine limits - this one borders on
abuse.
Mark Ravinski
N360KB 1320 hrs.
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