cold or warm oil change?

[porschegeorg]

Guys,

I have my Box in winter storage. It will be sitting idle (with battery maintainer) for about 5 months. Before I get her back in operation in the spring, I plan on changing the oil.

Should I warm up the car with the old oil before doing the oil change? Or should I simply drain the old oil while the car is cold. Keep in mind that I change this oil every year (not every 2 years). I'm not sure if the oil need to be warm so that it flows out easier, or if even when cold, it will eventually all flow out.

I really appreciate your thoughts on this.
Thanks
Georg