BDRAG
HAhahaaaa.
I tried to find the BS flag, but couldn't....but.... BS.
I have the 5 star, 87 eco tune, and 100+ miles, with a 24 mph tailwind, I saw 15.0 mpg.
Over a 5 mile distance? maybe, if you were already on cruise and reset it. Reset it and drive 50-100 miles on a highway, and lets see what you get.
12.5 -14.0 if lucky at 70.
BDRAG