I'm not normally sentimental about nicknames or other things but I still call my son "little fella" even though he is taller than his mum and will be taller than me quite soon - I'm picturing the little kid of 5 still. And my wife (who is less sentimental than me) uses my old nickname for her as a password - and no, I won't be posting it
But I like to nickname cars I like - if there is no name there is no bond, and so I will end up resenting it when it breaks or lets me down or I will just look for an excuse for it to go.
On topic - finding a name for a car is something that only the owner should do IMHO - your nickname is given by your family based on your character, behaviour and attributes.
You have to think about that character and those attributes your CRX has. Maybe its a noise when it does something, something about an angle when you look at it, something it has managed to do, something it has failed to do too
Or something you had to buy, or resisted buying.
Or indeed anything else.
Good luck.