I have no idea about the volume argument, but empirically it did not
happen
on my plane. The TIO-540 has an 8 qt capacity. Anything over 6.5 quarts
gets
blown out, before and after the M-20 went in.

This doesn't make sense to me.

A) Why would your TIO-540 blow everything except 6.5 quarts, while my O-540
would settle at 8?

B) Why would any oil "blow over" at all with the air/oil separator
installed?
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"