Congrats I really envy FLX manual owners because not only is the Getrag shifter much nicer in terms of feel (I haven't tried it but the Aichi Kikai in the BLM and FL must be the worst around) but the ratios are tuned better now.

Your engine being new will need to be worn in and consumption should get progressively better the more you drive. Using the bars to measure fuel economy should be used only as a very rough estimate as the float calibration level may differ from car to car, and also depending on the slope.

Fuel consumption is highly dependent on traffic condition, your left foot and gear shifting style. Perhaps if you described the three factors it would help us estimate your consumption better. But remember that the engine is still tight and new.

Go get yourself an account at www.fuelly.com and use it to track your consumption. Remember to fill to the brim for each tank.

How much you can fill in depends on how low you run the tank. When the warning light starts blinking you still have about 10-12 litres in the tank, although a part of it may not be usable.