Do I need to purge

No, Never.

Only on opening of oil cooler, oil pump needs purging.

Hi Damien,

There is no need and you shouldn't rotate the prop if the oil system has no oil in it or the system is open. If you do a purge should be done.

I was always taught he should purge. Just like if he was doing a hose change. I had a customer do this same thing once and Eric Tucker said yes he should purge. Here are the two things that could happen.

Is there a chance he's okay. Yes

Now is there also a chance he's not okay and causes severe engine damage, Yes. So you're flipping the coin on whether you may have to replace an engine for $18.5K just for the engine not including labor.

Why roll the dice for 20 minutes of easy work. There are no do overs if it fails.

Better safe than sorry.

Thanks Roger.

Purge it is, I rotated the prop while the tank was empty. Rookie mistake.

Thanks