What car do you have? MY06 WRX
What engine is it? EJ255
What mods?
TBE exhaust, STI TMIC, TD04 @18PSI (1.3bar), 18 inch tread (Up from the stock 17 inch) this can make a difference in speed & Avg L of Fuel to the km.
Whats the transmission? 5 speed MT
How many km's do you get to a full tank? 400-450 Pending stop start traffic for work & Lead foot fun.
What Fuel do you use? BP Ultimate 98