Mishimoto intercooler and Tune+.
I'm averaging roughly 25.5 mpg over the last 3k miles doing 75% highway. The rest is mostly full throttle data logging.
I averaged 31 mpg on a 200 mile highway trip when it was 50 degrees out. When temps are warmer I've seen 35 on the highway at 65-70 mph.
Livernois, what's the deal with this one? I figured you should know what the problem was. The op flaked out.
http://www.mustang6g.com/forums/showthread.php?t=45918