I was always under the impression that new cars had better fuel consumption than older ones. I recently bought a new model (second hand) Honda Civic 1.8 ivtec ES auto having had the old model (same spec) for some 4 years. The old Honda returned 43 mpg but the new one only 36mpg (inline with your fuel consumption website). What is the reason for the poorer fuel consumption.

Is there anything my local Honda dealer can do to improve it?