hahah another person thinking they are going to get better mpgs out of a tank...like those engineers who get paid the big bucks to meet EPA requirements and have the most fuel effecient combination they can possibly make in this truck havent already done all there is to do...
tell ya what...go to ebay and get ya one of them magic chips and some gas treatment and one of them fuel catalyst things and all that other crap people belive in......
I have added black step bars, 20% tint all around, X-liner (soon),
Stainless steel gear shift, going to add K&N filter. Looking into getting exhaust systems. I have a shop here in town that bents the pipes and you just have to buy the pipes.
Barney must have had a good day today, because normally he would have told you to search. This question has come up many, many times. You need a really, really light foot to get anything approaching decent mileage. With a full tank of gas and a passenger or two, you're at 3 tons. That takes juice to move
in a nutshell you can expect
14-15 in traffic.
17 or so on a long run 75-80 mph.
A tad over 20 on a long run if you STICK to 65 all the way on cruise.
I had intake and exhaust on my last truck. It sounded like a beast but didn't do any better for a mileage. I also beat on it harder when I realized how awesome it sounded. On this truck, I have ranged from 18.7 mpg all highway with the cruise set at 63-64 mph to high 16s with lead-footed highway driving at over 75. And under 16 mph highway if I drive it like I stole it and cruise at over 85. The 18.7 mpg didn't cost a thing, and I didn't have to wait several months or a couple years for the fuel savings to pay for the mod before I started seeing actual money come back into my pocket.
Of course I only got it once because I only drove the truck like that once. I have a 5.7. Blowing by sports sedans like they aren't moving in a 6000 pound 4x4 crew cab is way too much fun for me to be puttering trying to turn horrible fuel mileage into only really bad fuel mileage.