This cars consumption is 30mpg city/44 highway EPA. From my own experience with a much smaller car if I add the two together, divide by 2 and multiply by .8 I arrive at the milage figure that I get. The kind you get by just keeping up with the trafic. I suspect that the earlier Accords must have got better figures than quoted in the specs here. Engine efficiency is a function of compression ratio. CVVT I believe allows the CR to be higher but there are no major gains to be had here. Hence the move to hybrids. Weight reduction is probably the area where the best gains can be made, vehicle and human if you will (that includes me). Ever increasing size is certainly not going to help here. Having a large tank may not be a good idea for many. Carting 150 lb of extra weight around is contra-indicated for good milage especially up hill. Maybe filling your tank half way is a good idea if that is feasable.
Just spotted another spec sheet... EPA 26 mpg city/37 mpg Highway.(Canadian) converted from US gallons. Which is right?
If the latter figures are correct an on the road average might be 25.3 mpg.