I usually run my 360 on australian PREMIUM unleaded, or vortex or whatever they call it, but my parents put some standard unleaded in and yes, it was pinking like a bastard. But what about ethanol blended fuel? The australian government wants to mix ethanol with unleaded.

To stop pinking on lower octane fuels, timing has to be adjusted which is a bit more of a major thing with a renix, premium unleaded is 15c/L more than normal unleaded here and it gets around $1.25 - $1.30 per litre