So drove the Shelby 800 miles for a family function. It returned 19 mpg going uphill and against a hellacious wind. On the way I detoured through Mexico, found a deserted lllooooong stretch of highway and, at 5000 feet of elevation touched 160 with plenty of oomph left. My folks place is at 7500 ft. elevation and I can report 13 glorious pounds of boost screaming up the mountain. This car rocks. Love it more and more with every mile.