Car has poor gas mileage even though i changed the oil and air filter?

Hi i brought a V6 3.0l ford taurus 1996 about 3 weeks ago, the car drains out gas. I literally have to be spending $15 for gas every day or every other day depending on how many miles am driving. I recently changed the oil and air filter, the performance of the car has greatly improved by a lot, but the gas mileage... show more Hi i brought a V6 3.0l ford taurus 1996 about 3 weeks ago, the car drains out gas. I literally have to be spending $15 for gas every day or every other day depending on how many miles am driving. I recently changed the oil and air filter, the performance of the car has greatly improved by a lot, but the gas mileage has only improved just a little a bit, is there anything else I can do to improve the gas mileage?
8 answers 8