Car: 1995 R33 S1 GTST RB25 auto, 3inch exhaust split into twin cannons. K&N pod filter, FMIC, rest pretty much standard.
Gas of Choice: Caltex Vortex, BP ultimate.
$ Per Tank: Approx $90. Avverage between $1.50 - $1.60 per Litre
I really have no idea of kms per tank as i mainly drive around town & dont take much notice. But I didnt have to travel to Sydney a month ago which would have been roughly 1000km round trip & cost me about $150 - $160 which i thought was quite good at the time.