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From: RWolf99@aol.com
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Date: Wed, 5 Jan 2000 02:50:52 EST
Subject: Air/Oil Separators
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In a message dated 1/4/0 9:55:06 PM, you wrote:

<<These engines just don't need to be kept to the full mark ... They'll run 
forever a
couple of quarts down, so why fight it?>>

My Cessna 150 will also rapidly expunge the first half-quart of oil if filled 
to capacity.  But not any more than that.  I fill it up to one-half quart 
below the maximum.  While I generally agree with the comments of Dan and 
others, shorting your engine by two quarts seems to be excessive.

Maybe my experience is with teeny-tiny O-200 engines, and the bigger ones 
regurgitate more than the topmost half-quart.  It's easy to tell for your 
airplane.  Track oil consumption as a function of how full it is.  (Make a 
graph of oil quantity versus hours flown since filled.)  You can read the 
dipstick to within about an eighth of a quart.  Measure when the engine is 
stone cold (the only completely repeatable condition).  Wipe the dipstick off 
before reinserting and measuring.  Oil seems to wick up my Cessna's dipstick 
between flights -- if I pull it out and read it without wiping it off and 
reinserting, I'll get a reading that's almost a quart high.  Never saw a 
Cessna do this before, but hey, that's just how my airplane is.  Yours may be 
different.

Rob Wolf
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