The 370 has knock control at all rpm but the 350 hasn't I'm sure.
I don't understand why people spent 25k on a car and then grudge an extra couple of pence a litre on fuel. Amazes me.
This stuff has been checked by tuners, namely abbey motorsport who have a has various engines fail due to wrong fuel and also checked for knock while on standard 95 Ron fuel and confirmed the 350z doesnt like it at all.
Why grudge a few quid a tank for what potential could be a fatal end to an engine
350 only good to 4500 rpm I believe for knock control
Yep so I'm led to believe, I'm sure my ecu has it throughout as it's not standard but I still wouldn't risk it for the sake of a few quid