That's heavy fuel usage! Shouldn't be that high unless you are simply sitting in traffic that is hardly moving all day long! These things HATE traffic and stop/start traffic.
Just for fun, check my car's econometer to see what my typical fuel consumption is based on the driving (and of course also CPT). I always reset my average consumption meter so, it tends to start high and work its way down, and this was after a fair amount of shorter town driving before taking her onto the N1.
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Then later on just driving around some residential areas, I tend to try and keep my econometer under 10 l/100 km.
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And yes, I also find that often, driving a bit harder and more assertively can be more frugal, but this comes down to getting up to cruising speed quicker, and then feathering the throttle to maintain speed. Also the choice of gears helps.
If the car is still under motorplan, I would have it checked - might be an O2 or MAF related issue. :thumbs: