Do a search on here about the fuel pressure regulator.

I disagree - It is a very SIMPLE instal. The hardest part of the install is getting an allen wrench to turn the rear bolt (honestly).

It is about $70 bucks and if you can get the allen bolt off it takes no more than 20 minutes. I did this install and I am no mechanic.

I jumped from about 10 mpg to about 14-15 with just that. I am now running 17.5 average - and dont forget I am lifted with bigger tires.