Well i finally ordered another superchips programmer for my truck and i really noticed a big difference in gas mileage on the highway. before i was getting 15 to 16mpg if i was lucky doing about 120kmh now i am getting 18 to 20mpg doing the same speed wind differs from day to day but it deffinately got better.

 

Why did you order another one? What happened to the first one?

 

+1. I love the mileage increase I get with mine too. In a year it will have paid itself off in fuel savings alone.

 

Will it hurt the motor in any way?
I'm new to programmers. I just don't want to hurt my hemi. I know a guy with a Ford that has one. He loves it and it has 3 settings tow, power and mileage. It's an Edge.

 

yeah i'm curious as to why you had to get another one??? makes mes nervous as I just bought one yesterday lol

 

I'm wisihing my identical truck would do better than 10.6 mpg on the highway with the cruise set at 75.

 

nope.......well i can't speak for all of them, but superchips and bullydog operate within the factory parameters.

john m>>>>"10.6"? sounds like you have some underlying problem....on flat road i get about 23-24 hwy mpg with my programmer on the performance tune. i averaged about 21 on a 600 mile trip i took through some hill country.

 

Does anyone know about power/mileage gains with a chip in a 4.7 I'm getting about 14.5mpg now with the A/C on constantly.

[IMG]local://upfiles/70577/73FD67A167AC4A60A92F9BACA7BE5B01.jpg[/IMG]

 

To the best of my knowledge they don't make a chip for the 4.7.

 

I don't know how in the world you're highway mileage could be so bad! I have a TON of extra weight on mine and if I set the cruise on 75 and travel from my home to the farm in south Ga., I get upper 14's to low 15's WITH a 650lb. ATV in the back. I'm carrying a ton of weight, suspension lift w/subframe, 35" tires, grill/brush guards, winch, a toolbox that's gotta have 300+ lbs. of tools & mig welder in it, gear for a week of fishing/hunting. Before the lift & tires (winch, etc.) when mostly stock, except 33" tires & dual exhaust, I got right around 17mpg on those trips.
I've done some mods to help the fuel economy (CAI & E-FAN) but nothing to offset the huge weight difference between my truck and yours.
You may want to take a close look at your truck, possibly your throttle body is dirty, mine has been really dirty a couple of times and I've had to clean it out twice now (in 35k miles) and it's probably due again.