220 miles to 14 gallons, or 19 gallons? How heavy is your foot? This will make a huge difference in the gas milage you get. If you drive like a granny it will improve, floor it everywhere and you get 11-12mpg like you are now. Around town stop and go driving compared to constant throttle highway driving will also have a huge effect. Other factors could be a problem also, bad O2 sensor, faulty AFM, vacc leaks, old spark plugs, weak spark, fuel problems, the list goes on. When was the last time you did a full tune up on the car, replacing all of the filters and items listed above? Either way, even though it is an N/A don't expect any incredible MPG numbers, it's not a hybrid and it wasn't designed for fuel saving.
