Since shipping my CU2 to the UK, I have been using Shell V - Power and BP Ultimate which is rated at minimum 97 Octane. The BP Ultimate is superior IMO and there is NO PCS.
Unlike Ozzie V-Power, the stuff here seems a bit better and the car is less prone to PCS (invoking PCS is quite difficult). My choice is BP Ultimate as there seems to be an added advantage in fuel economy.