Car is using too much fuel

I feel your pain there. The basic things that you can do are: (1) a tune-up (new plugs, wires, PCV valve, air filter, and clean the contacts on the ignition coil); (2) drive the speed limit, avoid fast acceleration, and let the car coast a little when coming to a red light or stop sign; (3) Avoid running the air conditioning when driving in town (it tends to use a lot of extra fuel); and (4) some people report that using premium gas helps.