Originally Posted by
primetimex
Well that is quite interesting, that CU2 is the same tune for all regions. If that is the case then I don't even want to know what 95RON fuel will do to the CU2 engine. Overall post-combustion noise aside, the Ultimate seems to provide best power / responsiveness ratio vs the Vortex 98 - bar the cost of fuel which has just jumped to $1.27 overnight from $1.12 here in Perth.
Unfortunately 100RON is not available in Perth - unless anyone can tell me otherwise?
I used to mix'n'match Vortex 98 with Ultimate as Caltex is just nearby my place of work and the nearest BP is on the other side. Now, I think I'll just stick with BP Ultimate exclusively unless I go broke.