Hey all another newbie here, was going to start a new thread but I'm in the same position as you euphoria, got a CTR and looking to change to a 350Z, had the CTR about 2 years now and fancy a change.
Not in a real rush so got plenty of time to find the right one but hopefully will have one soon.
I was looking at running costs also and from what I've read it doesn't seem to be too different.
The CTR does use oil especially if you use the Vtec regular, a litre every 2k miles or so sounds about the same for me.