362 miles, 10.279 gallons filled, 35.22 mpg @ 75 MPH on a flat highway in a 2015 Toyota Corolla LE Eco Premium.
414 miles, 10.135 gallons filled, 40.85 mpg @ 70 MPH.
I bet I can do 450 miles @ 65 mph. The sweet spot seems to be around 60-65 mph for most cars. The car is definitely exceeding...