Yaaaaaa... I recon the city driving give you the high reading.. in city driving (driving around melbourne CBD)...i also received the reading of 14-15L. and i have been using shell v-power for about 1 year... in urban/city driving, my reading will be between 11-12L/100km. Well as for tyre pressure... i'm currently running at 32 front and 28 rear, because i'm not carrying any passenger. I've try putting the pressure up to 38psi in all four tyres. and did only improve a tinny bit, less and 1/2L different per 100km. BUT the car will be supper bumpyyyyy... you will notice every tinny bumps on the road.. even a tiny rock.. and it's good dam unconfitable... So if you want the car to drive like a luxury car. try putting the pressure done to 30psi and FEEL THE DIFFERNET. Try on a speed hump and enjoy the softness of going over it.. cheeeeeeeersssssssssssssssssssss Tony.. PS... Just changed my air filter, and the air filter make a HUGE differnet in fuell comsumption.......so if you havn't done so... please please change it and let me know the different...........