I live in Pennsylvania. From November to March, I was averaging 39 mpg. That is what was in the Prius v data and my calculations through Gas Cubby app. From April till today, my average has been 42-44mpg. I drive mostly back roads, which is like the highway for speed but I have a lot of steep hills, slow downs with old people and trucks, etc. I do drive in city and on highway too. I would say I average about 100 miles a day. I also still drive like a regular car and don't draft or hypermill or anything different. I also carry kids and dogs and stuff...so this is also under the strain of a load. I am amazed at the mileage I am getting (an average of 400+ miles a tank).