Yes, exactly. -Sami

Doug wrote:

I have often thought that what is needed is a scientific study of what
works best in aircraft engines. Get a statistically signifigant number
of engines. Rebuild them. Put monitoring equipment in the aircraft.
Instruct each owner of the aircraft to run the engine in specific ways.
Numerous groups of engines being run different ways. Oil selection, oil
change frequency, leaness, shock cooling etc could all be studied.
After 2000 hours of running one would have a pretty good idea of cause
and effect.