We are now parting with our Jazz EX CVT (but it will be staying in the family).
Over 30,000 miles in mainly town driving we have averaged 44.5 MPG actual (measured brim to brim). Our best MPG was 57.7, during summer, and the worst 30.5 over a 60 mile period during a cold December.
We have never put any oil in it between services. Apart from wiper blades and service consumables, the only items we have replaced are two front tyres at around 26000 miles. Not bad all told.