Simulated Engine Failure – Throttle or Mixture

[hugh flung_dung]

The standard advice (and UK practise AFAIK) is to use mixture above 3000 ft and throttle below 3000ft - this came from a Lycoming publication a few years ago that I now can't find.
Mixture is kinder to the engine but recovery can be delayed if stude does the wrong thing or if the "live" engine chooses that moment to fail for real.