I travelled from my home in NE Florida to Franklin, NC yesterday in my 2016 Premier. It was 410 miles. I have the Trifecta tune, but for the sake of seeing what the stock mileage would be I kept it in stock mode all the way so that the autostop would work as well. I averaged 42 MPG on the trip and I drove pretty conservatively on the trip as well. On the return trip I will use trip B and see what the mileage will be with the Trifecta Tune on performance and update when i get back home.