Hello Finished a 390 mile round trip on my 2011 Prius Gen 3. 2 adults 1 child and trunk full to the brim. High head winds for 1/2 of the trip, AVG 44.5 MGP (US). AVG speed was 70 MPG. AVG temp was mid 50's F. Very happy with this, I think I would have done better if I didn't have head winds. They were really strong. Love the performance of this vehicle. Thanks