mileage
I have a 2012 dually 4x4 gmc bone stock. I drive it decent and get only 13-14 mpg. about 12000 miles on it . I also have an 03 GMC with bully dog, 4 inch exhaust, hi flow intake and it gets 20+mpg. any ideas on the 12 to get better mileage?
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Get rid of the DPF. Will almost guarantee a 3+ mpg increase.
Efi-live will be needed for tuning, and will help mileage also. Stock intake is fine. Water/meth inj will help. Downpipes are rumored to help, manifolds/uppipes as well. |
^^^ pretty much sums it up.
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with any duramax it will be hard to beat your MPG numbers. a DPF delete wont hurt but with only 12000 miles the engine is far from broken in and will typically get a little better when it is.
i would give it some time and wait for the warranty to expires first |
I ran a 2000 3/4 ton Chevy with a 6.5 duramax. After 37,000 km mileage went to 24 mpg highway and 20mpg when in town and that was pulling trailers so it should increase when broke in.
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Originally Posted by dwilly
(Post 1005712)
I have a 2012 dually 4x4 gmc bone stock. I drive it decent and get only 13-14 mpg. about 12000 miles on it . I also have an 03 GMC with bully dog, 4 inch exhaust, hi flow intake and it gets 20+mpg. any ideas on the 12 to get better mileage?
4. How much extra fuel does regen take? My best guess comes from the mileage adjustment I see under steady state operation. For instance. My trip this weekend averaged 19.7 MPG mixed over 700 miles. The truck entered regen at 700 and regen-ed for 40 miles. At the end of regen the DIC showed 19.2 MPG. If I'd done the 740 mile trip without regen at 19.7 MPG I would have used 37.56 gallons. At 19.2 MPG, I used 38.54 gallons - a difference of about a gallon or 2.6% more fuel. My suggestion is to take a look at the LML SPADE. If you would like a quote I can PM you one. |
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