Greetings, you will love the car. I drive a mixed city/highway, and have been averaging about 41 to 42 miles per gallon. I drive in a hilly section of Jersey. On pure highway driving (normal with my usual driving at 60 to 70 miles per hour), I averaged about 45 miles per gallon for a 150 mile trip.
These are real world numbers based on my calculated miles driven per gallons used. There are not the computer. These numbers are much better than my Jetta TDI diesel wagon!