Completed my first service today and was surprised to require more than the designated 3 US Qt. - 2.8L of replenish oil.
I ended up closer to 3.1+L to have correct sight glass measurement when warm and held upright (center).
Nice one, thanks @Charliemurphay - that's where I ended up, about 3.5 Qt. and it's bang on the top of line in the sight glass (as it was before the service).
Good to know it's not just me.