Skydrol and similar are great. Turbine oil is also mostly
synthetic and doesn't congeal. But most people don't fly C
130s and hang out here, in rec.piloting.

Most ME training is done in a piston powered light twin with
petroleum based engine oil shared by the prop.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"Bob Moore" wrote in message
. 121...
| Jim Macklin wrote
|
| But if you are
| flying a multiengine aircraft in cold weather and shut
an
| engine down in training including feathering, the oil
may
| congeal to the point the prop won't unfeather. So ME
CFI be
| careful what and where you practice.
|
| That is true of course unless you happen to be flying a
big
| turboprop that uses something similiar to hydraulic oil
for
| its prop control mechanism. We routinely shutdown
(feathered)
| numbers 1 and 4 for endurance purposes.
|
| Bob Moore Allison T-56 operator