Keep your engine tuned up. A misfiring spark plug can reduce fuel 
        efficiency as much as 30%. Follow the service schedules listed in your 
        owner's manual. Replace filters and fluids as recommended. 
        

Check your tires for proper inflation. Under inflation wastes fuel-your 
        engine has to work harder to push the vehicle. Wheels that are 
        out-of-line (as evidenced by uneven tread wear or vehicle pulling) make 
        the engine work harder, too. Properly maintained tires will last longer, 
        meaning fewer scrap tires have to be disposed. 
       

 Keep your air conditioner in top condition and have it serviced only by 
        a technician certified competent to handle/recycle refrigerants. Air 
        conditioners contain CFCs-gases that have been implicated in the 
        depletion of the ozone layer. According to the Environmental Protection 
        Agency, almost one third of the CFCs released into the atmosphere come 
        from mobile air conditioners; some simply leaks out, but the majority 
        escapes during service and repair-so it's important to choose a 
        qualified technician.        
        

Observe speed limits. Mileage decreases sharply above 55 mph. 
        

Drive gently. Avoid sudden accelerations and jerky stop-and-go's. Use 
        cruise-control on open highways to keep your speed as steady as 
        possible. 
        

Avoid excessive idling. Shut off the engine while waiting for friends 
        and family. Today's vehicles are designed to "warm up" fast, so forget 
        about those five-minute warm ups on cold winter mornings. 
        

 Plan trips. Consolidate your daily errands to eliminate unnecessary 
        driving. Try to travel when traffic is light to avoid stop-and-go 
        conditions.