I have an R32 GTS-t with the following mods...
FMIC, 040 Pump, POD, 14PSI, 3" Ex + Dump, 18" Rims (believe it or not but they can make a big difference in economy) Dr Drift retuned ECU
I generally get about 300-350 per tank normal driving - occasional squirt. Was a lot worse before the tune as it was running megga rich!