6.7 diesel from good to bad fuel mileage
Champion
Joined: Feb 2005
Posts: 3,710
Likes: 2
From: Skagit County, WA
It was a fair load in the truck (3 people, luggage, coolers, camping gear, propane tank, etc) and the bumper pull trailer with all of our earthly belongings in it. 12,700 on the trailer axles, and around 10k on the truck axles.
Registered User
Joined: Mar 2024
Posts: 1
Likes: 0
I have a 6.7 in my 2008 ram 2500, I used to get 20/22 mpg hwy mileage.It's got approx. 47000 miles the fuel mileage has dropped from 20/22 mpg hwy. to 13/15 mpg. No significant problems runs good no modifications cannot figure out. Speed does not matter, 55 mph or 70mph still poor mileage. Any suggestions.
did you ever find out what was wrong with yours? Mine just dropped drastically from 17 to 13.