JMLBlues@aol.com wrote:

I think it may be a bit of a stretch to extrapolate passenger car experience
with no oil metering to higher duty cycle uses. In high load applications
(such as marine, with which I am very familiar), a loss of oil metering can
lead to a phenomenon where the apex seals suddenly begin to leak badly. This
is characterized by leakage into the intake stroke combined with a sudden
loss of power. Reduction of the throttle nearly to idle will allow the engine
to recover, but the engine will become more and more sensitive and produce
less and less power each time this occurs. We have called this "fall-off," as
that term seems to describe the way the engine loses power. This situation is
far worse in boosted applications, but will happen in naturally aspirated
engines. Advanced ignition timing makes it worse.
Jon Lauter, Rotary Power Marine Corporation

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