MPG question/2010 dodge 1500 HEMI

[Gmm004]

2010 Dodge 1500 Hemi 4x4 Predator

I installed the 87 performance tune and saw a huge decrease in fule millage
was getting about 16 on free way and 14 around city after tune i got 13 on free way and 10-11 in city. Anyone understand why this would be???

Tried to see if it was how I was driving, drove like a little old lady for a tank still bad millage.

Tried 93 tune and did not get any better millage.
Also get bad clatter out of motor when shifting in and out of ECO mode, seems like that could be causing dammage. A

Any help is useful

[superbee69]

I'm not a tech guy at all, I just want to add a comment on my mileage increase, when I installed the 87tune in my 09 Hemi sport, my fuel mileage jumped to 22.4 mpg on the hiway. I have a photo of it on my blackberry to brag to my bud's about my great fuel mileage. I really would like to help you out with this issue. But I'm puter stupid. Hopefully support can answer your question.

[mikel]

did you actually verify mileage with the odometer, or this is based on the display?

[tylermclean]

hey man take off mds and increase ur throttle boost to 10 % i have a 2008 dodge ram 5.7 l hemi sport and i get 26 mpg on hwy and 18 in town and i have a photo to prove as well but try that