My lowest came in at 38.1 mpg on the first tank, 2nd tank was 38.4, and from there it's been over 40 mpg with the highest at 45 mpg - almost all highway - high speed! I couldn't get that out of my v5 at the same hwy speeds. I don't have an all-city route as my typical daily driving is about 50/50. I have 16 stop lights and 3 stop signs each way on my commute. Unfortunately, the spread between diesel and gas is still between 50 cents and $1.10 around here. But that's the price I'm willing to pay. If you don't know my story of how I ended up with the Passat, look under the Prius v forum for a thread titled "My accident".