My last 3 tanks have been around 520-540km out of 56-58L.. ~10.7km/L
Power fc, high flow turbo on 12psi for daily driving. Spend a fair amount of time idling waiting for parking at uni and i dont drive like a granny either
New O2 sensor, spark plugs and using engine braking to keep injector duty at 0% as much as possible help abit though