As a trucker fuel economy is a HUGE part of my entire livelihood. I have found a few things that work well both in my tractor and in my x.

-Slow down.
-When on longer trips use the cruise as much as possible.
-Avoid idling whenever possible.

X's have never been well known for their amazing fuel efficency but I've noticed that these things help a little bit.

Also, anybody have an actual nmpg for 4L on a rough trail? Seems like I burn through a tank in crazy speeds when I'm on the trails.
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Whoever it was that thought it was a good idea to put the alternator on the bottom of the engine owes me somewhere around 500$