'11 Duramax LT or LTZ
09-19-2011, 12:19 PM
#51
Platinum Member
That's not very low. I don't remember the tank size for sure and am to lazy to search it, but I think its close to 7 gal. Defineatly not 2.5.
I will be interested to see how the tuner does.
I am going to leave mine stock until the warranty runs out as I am really happy with the performance and mileage is good enough that I can enjoy the peace of mind the warranty gives me when out on the road.
I will be interested to see how the tuner does.
I am going to leave mine stock until the warranty runs out as I am really happy with the performance and mileage is good enough that I can enjoy the peace of mind the warranty gives me when out on the road.
We have not had any problems with our 11 GMC to date with 28k on her...my buds 11 Chevy has been in 6 times for def problems like I posted back a few posts.. Good Luck WaterBoy.
09-21-2011, 10:46 AM
#52
Registered
Thread Starter
Join Date: Apr 2006
Location: Grand Lake (E-Dock Junior Varsity)
Posts: 3,017
Likes: 0
Received 1 Like
on
1 Post
Well maybe the tuner isn't the way to go then.. Its not really the HP increase that I was wanting, more MPG was the goal. Thinking now maybe I'll stick with the exhaust and intake and keep putting miles on hoping for better economy. My iphone App is showing 12mpg now at 4100 miles. I just filled up last week and I'll be hand calculating it so see if theres a difference.
And the reason I was saying it held all of the 2.5 gal jug was that if the tank was still over half full and the level sender was misreading, it wouldn't have held the full 2.5 gal. I guess they don't fill the tank from the factory. Has anyone heard of any DEF tanks getting a hole knocked in it? We spend a lot of time on dirt roads (not MY truck, but our others) and the rockers take a beating with the gravel. That tank seems to be in a HORRIBLE location..
And the reason I was saying it held all of the 2.5 gal jug was that if the tank was still over half full and the level sender was misreading, it wouldn't have held the full 2.5 gal. I guess they don't fill the tank from the factory. Has anyone heard of any DEF tanks getting a hole knocked in it? We spend a lot of time on dirt roads (not MY truck, but our others) and the rockers take a beating with the gravel. That tank seems to be in a HORRIBLE location..
Last edited by waterboy222; 09-21-2011 at 10:50 AM.
09-21-2011, 11:22 AM
#53
Registered
Join Date: Apr 2007
Location: NY
Posts: 258
Likes: 0
Received 0 Likes
on
0 Posts
My HD2500 gets 14-14.5mpg with a mix of around town and short highway trips. 20-20.5mpg with strictly highway driving. My truck has 33k miles, and I'm thinking that's as good as the mileage is going to get. Remember that one regen cycle kicks the crap out of the average economy. Another thing, is that a dually has a shorter tire on it than a single wheel truck, so your effective gear ratio is lower... ie: worse for fuel economy.
09-21-2011, 11:55 AM
#54
Haven't checked mine lately and I am usually pulling something. The 17 mpg was staight highway going to ponca running 85ish. I get about 10ish pulling the 43'toyhauler. I have about 30K on it now. I don't always get the oil changed when I should so I have bought alot of the 2.5 gallon DEF's. They seem to last a really long time. Longer if I'm not pulling.
Wasn't trying to talk you out of the programer at all, I may put one on after my warranty. But for now I am happy with the mileage considering it is a dually and has tons of power.
And after my experience with the Ford, I really like having a factory warranty.
Wasn't trying to talk you out of the programer at all, I may put one on after my warranty. But for now I am happy with the mileage considering it is a dually and has tons of power.
And after my experience with the Ford, I really like having a factory warranty.
