GEN4 how are you getting it so low? I am running at 16 while going very easy on the juice pedal! As the engine wears in it should improve, I have only done 700 klms.
I wonder if your CAI is helping a lot?
G'day nickbalcombe99, when new, my thunder was pretty thirsty but I've done nearly 14,000kms in it now and she's nice and loose... So to speak...
When I say city driving it's a mix of 60 - 80km/h zones fairly free flowing... not stop start every 30 seconds type of stuff. The only mods I've done are dual 2.5" cat back exhaust and MCAI.
Overall I'm very impressed with the fuel economy. My last car was a 5L VS manual and on the same trip averaged around 13.5L/100kms.
What sort of driving are you doing? Your figures seem like you're doing mainly city driving.