2016 model. 107k miles. Drove from Lancashire to Brighton (UK) and back yesterday. ACC set to 75mph. Managed to do it all on 1 tank. Averaged 69.7mpg imperial (58mpg US). The journey included 4 hours of intense stop-start urban driving within Brighton as I had 24 drops to do whilst there. Drove 42 miles past the —— DTE fuel display and my calculations show there was still 3.6 litres / 0.79 imperial gallons / 0.95 US gallons left in the tank so could have gone another 40+ miles if necessary. The final stretch of motorway driving on the M6 was through 60mph average speed check zones. The Prius just excels here -flipping between the battery and ICE achieving 91mpg / (75.7 US)