We have exactly the same car, but have only covered 14000 miles. Most of our mileage is local short trips and overall our average mpg is 36.6. A recent 200 mile motorway round trip at motorway speeds achieved 46.7 mpg. When really trying on a rural roads trip, i’ve seen 51 mpg. I think it’s fantastic for a large heavy car. The coasting function is very effective.