[neon_rt]

If you add a low restriction exhaust, you may not gain enough mileage in town driving to measure, but you may gain 1-2 on the highway. You are best off to make sure that you keep the engine tuned up and you can gain some mileage (5-10%) overall by changing your diffs, transfer case and engine to synthetic lubes and oil. Using a K&N air filter direct replacement or FIPK (performance replacement) can add some potential to your mileage. Removing the mechanical fan and replacing it with an electric setup will save you some gas. This mod will also make your A/C (if equiped) work a lot better while idling in traffic on a hot day (if you set it up right). You can also dilligently check your air pressure in your tires and make sure you keep at least the minimum requirement in them. I use the door sticker guidline for the back tires but add an extra 3 psi to the front so the front and back tires look the same when the truck is parked. Tires on a 4wd can make a huge difference in mileage. A radial all season tire may yield 15-20% better gas mileage than a mud/off road tire. I change the tires on my Jeep before/after winter mostly b/c of mileage. I get 18-19mpg with the winter tires on and 21-22mpg with the all season tires on. A mod that you can do to save money that doesn't cost money is, improve your driving technique. That doesn't mean you have to drive slower, just smarter.