Jay,
I installed one of Bill Sandmans M20s on my Navion back in 2001.
Even
with a worn out set of Continental jugs and high blow-by my belly
cleaned
up almost completely. The engine was majored last spring and now the
belly is spotless even with a full 10qts in the pan. Made a big
difference
in my case and I'm satisfied with the performance of the little
critter.
Since my E225 engine runs hot I doubt that any condensation could
survive
after a flight of any length. Condensation and the sludge buildup
that
would result was my main concern since the M20 is not dis-assembleable
for
cleaning like the Walker/Air Wolf unit. At each annual I soak it in
AvGas
and then blow it out with compressed air. So far so good.

At the time I bought my M20 Walker had ceased building their unit
and
Air Wolf had not purchased the rights to it. I have an Air Wolf Oil
filter
kit on my plane and was very satisfied with their quality/value. If
Air Wolf had announced their intent to build and sell the Walker
design I probably would have waited and bought the larger Walker unit
specifically because of the cleaning issue. But I am satisfied with
my M20 and don't regret buying it.

GaryP

"Jay Honeck" wrote in message news:CyfTc.304529$XM6.124022@attbi_s53...
Atlas just got his oil/air separator installed today. (For those who may
not know, Atlas is our '74 Cherokee Pathfinder, so-named because he can lift
literally anything we can fit inside!)

We picked this new accessory up at OSH '04, after much debate. (It's a
helluva lot of money for what looks like a welded tin can.) The clincher
(besides the nice clean belly) is that I'll be able to run a full 12 quarts
of oil in our Lycoming O-540, rather than the 8.5 quarts we could hold
before. (Atlas would puke out the four extra quarts, if added.)

It seems logical to assume that more oil in the engine equals cleaner oil to
all engine parts, at all times. This seems like a very good thing, indeed.

Anyone else got one of these things? Are there any "gotchas" to watch out
for, or are they as bullet-proof as they seem?