Hi. Great forum, guys....thanks. I have a stock 2005 350z track version JDM car I just bought. Here in New Zealand we have mainly 91 everywhere and 95 or 98 depending on which gas company (BP 98 and all the others 95). Do you think my Z driven mainly like a granny ( in my case grandpa) will be fine on 91 which is a LOT cheaper here than high octane 95/98? I have done about 1000km and only used 91, but am now looking for info on my car on forums like this and am a bit worried that 91 might not be good enough. Prepared to use the expensive stuff if I have to, but do not want to waste quite a lot of dough if it is not needed. Cheers, and thanks in advance for any help. BTW do not complain about the cost of gas! You guys are SOOOO lucky!!