Original post by: dougwoodward ,
I have a 2013 xe 455 hp. Just finished first trip, sc to ca and return to sc. 77 gross out and 50 on the way back. 7.2 at 64 on cruse. The hill going west on I 40 past Needles 10th gear with the cruse on at 52 mph. Had bad headwinds and freezing rain past ok city brought the mpg down, but that's trucking. I hope for high 7s low 8s after break in .