Just got a new 2019 bel cab, 5.7. Left Maine with 1096 miles on it. We pulled a 8000 lb camper to Virginia going over the Western mtns ,never 95 side. Average fit the trip 11.8. I used 93 octane for the pull . the worst segment over mtns south of Scranton on I-81 I still got 10.6.
I was pleased...