Single-engine Endurance and Performance

[Cole5Oh5]

Follow the POH
Feather the engine that doesn't work, because if you feather the engine that was working, you got a lousy glider.
Close the cowl flap doors on the engine that isn't working.
Open the cowl flap doors on the engine that does work.
Go to max throttle, lean for performance. At full load, or pretty close to it, you can maintain altitude, at least at 5K, even on a warm day.
keep in mind, however, that you don't want to do this for very long, and you'll be down to blue line or pretty close to it, which is why it is there.
I was able to maintain altitude for a short period of time, on the front engine, but it was an emergency, and we headed for an airport right smartly.