depnding on your style of driving and where you drive. If you only use Highway/City/ or country road, big differences. If you drive alone or always with 4-5 passengers, heavy load or not in the trunk.
If you ask such a question, it must be more specified and then still there are differences.
Bet is you read the owners manual and if that somehow fits to your fuel consumption, it is alright.
I have read such threads about fuel comsumption more than 100 times and everybody has a different and of course right answer.
What you can do to reduce fuel comsumption:
keep the car in good shape, do not speed/accelerate if necessary etc., and replace wear parts such as distributor cap/rotor, fuel filter, spark plugs etc in regular intervals according to the inspection service intervals.