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Discuss Duramax fuel milege in the GENERAL DISCUSSION FORUM forums; Have a 2008 Duramax LMM with 32000km, C/W: PPE Delete programer, Air S&B Cool Air Intake, 5"MBRP Exhaust, Edge Insight, ...
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10-04-2008, 10:46 AM
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| Member   Join Date: Apr 2008 Location: West of Stony Plain
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 |  Duramax fuel milege Have a 2008 Duramax LMM with 32000km, C/W: PPE Delete programer, Air S&B Cool Air Intake, 5"MBRP Exhaust, Edge Insight, Still trying to put in EGR Bocker Plate. CAN NOT GET BETTER THEN 16 MPG. IS THERE SOMETHINGE I AM MISSING...  Last truck 2003 LB7 25 MPG.
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10-04-2008, 10:56 AM
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| Re: Duramax fuel milege you need to contact someone who knows what they are doing!!! those new particulate filters are there for enviro reasons, and the engine has been tuned to run with them. if you cut all that out, that could be the problem, could be a back pressure thing, combined with air/fuel computer problem.
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10-04-2008, 12:15 PM
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| Re: Duramax fuel milege Is that 16 mpg Highway, city or combined and what did you get stock. I have a 2007.5 LMM and get 22.5 - 23.0 mpg all highway. Driving to work everyday from Stony to the west end i average 20.2 - 20.6 mpg. This is hand calculated mileage. Truck is all stock and mileage is better than what every one told me i would get. Cruise is always set at 110kmh. Have yet to check mileage pulling my enclosed trailer but typically could care less about mileage when pulling. |
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10-04-2008, 04:35 PM
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| Re: Duramax fuel milege i have noticed that they don't get better until 50 to 80k pending on driving
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10-05-2008, 07:42 AM
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 | Re: Duramax fuel milege Originally Posted by jeremy Exactly do not take them out I'm a dealer and all WARRANTY we be gone.. They serve a purpose. Smurff is that combined mileage? Also do you have the speedo right with the tire size? What I'm seeing is 18 to 25 with the chitty Sulfur Diesel we have in the states... If it was my diesel that would be just about right foe all around the way I drive..
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10-05-2008, 07:43 AM
| #7 (permalink) |
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| Re: Duramax fuel milege Originally Posted by rmk800 800 I have had some customers tell me in mileage..........
  15 to 20 thousand....
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10-05-2008, 08:49 AM
| #8 (permalink) |
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| Re: Duramax fuel milege Smurf, if you keep your speedo under 180 km/hr, perhaps your mileage will improve, maybe put a block under the pedal to prevent driving over 110 on the highway! HAHA!
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10-05-2008, 09:00 AM
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| Re: Duramax fuel milege Originally Posted by Ryeser LOL Good plan Ryeser......
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10-05-2008, 10:12 AM
| #10 (permalink) |
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| Re: Duramax fuel milege keep speeding girls...... fuel consumption keeps me in business!!!! I find that the more I drink, the better my fuel mileage!!!!
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10-05-2008, 11:35 AM
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| Re: Duramax fuel milege Originally Posted by IMSICK What he said X2
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10-05-2008, 07:50 PM
| #12 (permalink) |
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| Re: Duramax fuel milege Originally Posted by Smurff1000 Play with different HP settings.I know with my last Duramax once I lifted it I couldn't get over 16 to 18 mpg and before that it was 20 mpg(with mods).I've done lots of reading on the LMM's and there is 4 of these trucks in my family and we all average 14 to 16 mpg and trucks with DPF delete only expect 4 mpg better on average.Which at todays prices is huge savings.So with a lifted truck expect a little poorer milage.
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