Hey everybody... I have an LB7 Duramax with about 130,000 miles... I don't really know what MPG's i was getting before some upgrades, but i'm really not getting good MPG now...

I have 35" tires, 8" lift, and Superchips tuner on Mileage XS setting... I'm getting around 12-14 MPG... I would think it should be around 17-20... Any thoughts???

I've checked for bad break calipers and all my fluids... Just FYI, sometimes i do pull away from gassers at red lights

 

with that kind of lift and tire you're going to get bad mileage, I have a 6'' lift and am sitting on 40''s and i get 12-15 in town and 20ish on the interstate

 

wow... yeah, that's about where i'm at with MPG too... oh well, it's fun to drive

 

Just be glad you are not getting 8.5 mpg like my last tank without any pulling was!

 

Have you changed your fuel filter recently? That may be the issue. I have an 8" lift with 37's and I've been getting 16-19mpg. Just an option.

 

Iv'e got the filter in the back seat... as soon as i stop putting in 35 hours overtime a week, i'll change it and see if that helps me out any...

 

How do you drive it? Like the little old lady or do you baby it?

 

hahaha... do i baby it? negative son! I understand why i get bad milage when i put it to the floor... my concern was when i'm open highway or driving like an old man...