Just went through a full tank of Petronas 95xtra. I must say I am really disappointed. For 68 litres, I only got 470km which is 6.9km/ltr. As for performance, my car felt heavy and sluggish. With Shell Vpower97, I have been consistently clocking 500-515km for 68 litres which works out to 7.5km/ltr, with excellent performance. So if I were to put driving enjoyment over everything else, I would just stick to VPower.