I was getting about 14mpg no matter if I was in town or on the highway. This last tank, I decided to try as hard as I could to drive with the intent to get the best milage I could. Takingoff from a stop, iI would accelerate very slowly, sometimes taking over a mile to get to 60. On the highway, I would try to keep it around 65 or so. Anything much over 70, and aerodynamics take over. I was absolutely amazed to see that after calculating that tank, I was getting 20.4mpg! That's a difference of about 200 miles per tank! Suffice it to say, Iwill ccontinue to drive like a little old lady.