Which Premium Fuel in Oz

[grnSVX96]

hey guys / girls ..or should it be the other way around....anyway...which Premium fuel do you use...

I recently discovered that all premiums are not the same, I'm now running 98 octane and around town get upto 50kms more per tank and the car performs better...regular premium ..usually in the discount stations [5 to 6 cents cheaper] can range from 91 to 95 octane depending on the 'brand'..

D2