23 is hard to believe even for the highway and some 400lbs extra weight maybe more but to each there own

The biggest thing I noticed for mpg was fuel i switched to 89 after a thread awhile back and gained 2mpg just from switching and i am finally getting in the 12's instead of the 10's so it offsets the cost alone

 

I have gotten 22.8mpg on the long flat highway trip. I average around 18mpg right now because my daily commute of 36 miles each way has a long 70mph patch of hilly highway.
It is possible under the right conditions.

 

Hemi44, do you have a chip or a PROGRAMMER??? because my PROGRAMMER got 1.5 mpg for me and the jet CHIP did not seem to help at all....i did not know that they had a diablo predator chip but if they do send me the link!

 

Agreed. Getting in the 20's is very possible if you get the right conditions and find that sweet spot where the engine is running at its most efficient. I can get in the 20's on the highway if I go the right speed which is usually around 70 mph.

 

Now I'm confused. When you said chip i thought you were referring to a
programmer/tuner, which are all names that the diablo predator is called.

This is what i have:
http://www.diablosport.com/index.php...isplay&pid=150

 

Man, I'm lucky to get 16.5 on my 7000# pig on the highway. But with a suspension lift, 35's and a bunch of weighty mods, I don't figure I'm doing too bad.
My '98 5.9 got about 8.5 in town and maybe 12 on the highway when I put a body lift and 35's on it...

 

a chip is literally a computer module that you plug into your computer under the hood. A programmer plugs into the port just like a diagnostics comp would. You can tune a programmer, thats why its also called a tuner. A chip just does what it does, I heard its about like a powerwire??? Correct me knowledgeable people!!!

 

A powerwire adds resistance on the AIT by using a resistor. Its nothing special at all and think is is a total rip-off for what the cost of it is new versus how much it cost to make one yourself.

On another note, IDK WTF you guys do to get 20+ on the road either. Im lucky to get 16-17. But Im used to it so I dont complain (too much).

 

It took me a good number of mods before I was able to get to the 20+ mpg mark on the highway.

 

Well look at my sig and tell me what Im missing...........LOL