My mileage has kinda increased since I started putting Citgo in it, one day I was looking for the cheapest gas, and Cigo here was cheapest, filled it up with that, got about 40 more miles to the tank then I did on Sunoco. With Sunoco, I got around 220 on a tank, and with Citgo, I go about 260+, and that is with like 12.XX gallons. So I'm sure I can get like 300 if I go the extra couple gallons. No my driving habbits haven't changed much, just a little bit.