Hey i have a 94 Geo prizm 1.6L 3 speed and i noticed the mileage on fueleconomy.gov for my car is rated 23/26 is this correct? Ive been averaging 20mpg but i use my car 90/10. I deliver food for a restaurant at night and go to school in the day. Is there something wrong with my car, or is this normal for my type of driving. Ive replaced the oxygen sensor and no noticeable improvement.