Tell us your avg's for fuel consumption??

I drive auto.. get shit ass fuel consumption... im getting high 11L/100km's.......according to the redbook, the car came out of the factory doing approx 11L/100km...Soo i guess im doing okay?? ....

I have to add that im using Honda FEO , 1 spark plug is fouled, 1 x pod filter. stock wheels on stock profile (195/60/15) 40 psi front 36 psi @ rear......thats the only thing i think that could effect my fuel consumption...O i i also use 91RON,, but i noticed i get more KM using 98RON ( but car doesn't crank as well on cold start using this )..

Fuel tank size, Should be either 60L or 65L