Reviewed By Walter D (Sullivan, MO) Reviewed for a 2007 GMC C/K 2500 —8/5/2008 9:34 AM
Installed on our Dodge durango hemi just prior to leaving on a long road trip. Missouri to Deleware. Fuel economy increased approximately 3 to 5 miles per gallon. We used less fuel than v-6 trail blazer w/cargo on top. 18 mpg in the mountains of West Virginia.