Ok after seeing that people are getting 300+ miles to a tank of gas, i am starting to think that there is something wrong with my car. I am getting 200 miles max to a tank of gas on mainly highway driving. What could be wrong???? I average like 150 miles to a tank. I have a 02 wrx with a cai, an sti exhaust, wheels, tires, and other than that it is stock. It was bought used. Any comments would help.