What is the best programmer available for the best fuel milage on an 07 5.9?

 

Quadzilla "Max Mileage Module" for sale here through DTR says 8-12% increase on fuel economy. Have 07' 5.9L myself (6 days old) and am looking for something similar, however not wishing to void the warranty its looking like we might have to go with the Smarty. ... can anyone confirm whether or not I am correct in my assumption?

Also, any recomendations on monitoring modules (again do not wish to void warranty)?

 

I have a Quad XZT which also claimed to improve milage. It did absolutely nothing to improve my milage. Did not decrease it, but definately no increase. I drive for milage (65 to 70 on the highway, short shiftr, etc.), so it's not like I'm using the extra power it gave me.

 

Here we go again

 

Good to know mark.

BlackSheep5, was there another existing thread on this topic that I overlooked?

 

I have both the Smarty and Quadzilla race. No improvement was seen using the Quad on any level, however I got about a 0.5 mpg increase with the Smarty. Still waiting for a mileage upgrade from Mads...............

 

I use the Smarty on setting #3 and my mileage (hand calculated) has increased from an average of about 18.5 to 20.5-21.5. Most of my tanks are about 75-90% highway miles at about 60mph with the rest short trips. Truck is 2003 HO, 48re.