Same for the Robin R2160. Anything over 5 quarts (roughly) is a waste and will be found on the fuselage after a few flights.
Edited to add that this is about the carburetted R2160 with no inverted flight fuel/oil systems. I have no idea what an inverted oil system would do in this respect.
Last edited by BackPacker; 28th Jan 2010 at 08:45.