I have a 2005 dodge 3500 and do good to get 10mpg out of it i average 9.5 hand calculated. It’s leveled on 245/75/17 A/Ts and 17in alloy wheels.As far as performance all it has is a tuner,s&b intake, and pacbrake exhaust brake.I have played around and changed the tunes and no change.No matter how i drive it i still get the same mpg. I have cleaned the map sensor as well and no change. I have used power service fuel additive and hot shot extreme and no change. I hear of people with trucks set up like mine getting at least 15 but most of the time 17-20. I’d be happy to get 14 at this point. Any ideas what i could do to fix this?

 

How many miles are on the truck? Have you changed any of the engine sensors(Crank and Cam Position)?
Are any of your brakes dragging?

 

Hi
what gear ratio do you have? I have a 4:10. My truck is thisty. Millage It also has high which has affected performance. Just something to look at
good luck

Howard

 

All good?