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| 2007.5 + (GMT 900) Non Powertrain--New Body Style-- Discussion 07.5 + Topics Not related to the Powertrain, interior, suspensions, body, wheels, tires, ect. |
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12-19-2007, 05:45 PM
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eBay Motors
#1 (permalink)
| | Junior Member
Join Date: Dec 2007 Location: Dalton, Ga
Posts: 20
| Mpg=wtf?
Just curious what MPG's Ya'll are getting out of the new LMM....Mine stays around 10.5-10.7 I just bought the K&N air filter and it actually went DOWN from 11.2 mpg.  | 
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12-19-2007, 06:00 PM
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eBay Motors
#2 (permalink)
| | Super Moderator
Join Date: Aug 2005 Location: Alaska
Posts: 1,659
| what kind of driving you doing (city I am assuming) and how many miles on it? Have you taken a highway trip with it? I am also assuming that those numbers are hand calculated right? (not that it matters, because you have to be filling up quite a bit with that mileage) Also, what configuration is your truck (2500HD, 3500 dually, crew cab, extended cab)?
__________________ 2004 GMC 2500HD D/A CC Carbon Metallic w/ LB7
4" turbo back MBRP exhaust
TST Powermax Programmer, Diablosport Predator
285/75-16 BFG T/A KOs, Eagle Alloys Series 187
Clifford 2 way remote start, High Idle, Bilsteins
Extang Classic Platinum Tonneau Cover
AFE Magnum Force Stage 2 Proguard 7 intake Kennedy Diesel Merchant Automotive My Photos | |
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12-19-2007, 07:31 PM
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eBay Motors
#3 (permalink)
| | Junior Member
Join Date: Dec 2007 Location: Dalton, Ga
Posts: 20
| 2007.5 3500HD SRW 4X4 Regular cab. LMM Duramax, Allison 6 sp. auto. That is city driving only so far. Truck has 1200 miles. Only Mod. is the K&N filter. The mileage is Per the onboard display. At $3.27 per gallon for ULSD here I haven't been able to completely fill up and get a hand calculated MPG. | |
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12-20-2007, 04:48 AM
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eBay Motors
#4 (permalink)
| | Knows your Mom
Join Date: Jun 2007 Location: Flinton PA
Posts: 1,361
| First off...I would get rid of the K&N filter.....they are nothing but bad for your truck. They let way to much dirt and crap through. Second....you need to hand calculate your mileage....because the onboard computer will never for any reason be right...especially when you buy a new truck. Mine said 10.6MPG when I first bought it...and after 2 months or so it made it's way to 15.2...and my hand calculations were 17.5....so it's WAY off. And considering you have a 3500....your gasmileage won't be what most people on here post....considering you have a heavier truck.
__________________
RIDE: 07 Silverado Classic Crew Cab
ENGINE: Duramax/6 Speed Allision LBZ 6.6
LIFT: Ready Lift Leveling Kit
STARTER: VIPER 2 Way w/ Turbo Timer
ADD ONS: H1 Halo Projector headlights, Back up Camera, Dee Zee running boards, Chrome Billet Grill, ExTang Solid Fold Tonneau Cover, Line of Fire w/reverse, custom bug shield/vent shades, TomTom GPS System
TIRES/WHEELS: 265/75-16 Grabber AT2 Tires on 16x8 ATX series Teflon Coated Wheels
PIPE: Banks Monster Dual Exhaust
CAI: Banks Ram Air
PROGRAMMER: Banks 6 Gun PDA w/Speed Loader | |
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12-20-2007, 06:05 AM
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eBay Motors
#5 (permalink)
| | Duramax Forum Moderator
Join Date: Feb 2007 Location: Barnesville OH
Posts: 3,445
| i agree with n0useforaname,your probalily getting better fuel economy then what the DIC is telling you.
__________________ James 
05 LLY Chevy LS E/C L/B DRW my older brothers truck now
2006 LBZ GMC SLE C/C S/B,sold the truck to my dad for a business truck
My Truck now,1987 Chevy 2500 350 tweaked,6" SuperLift,350 V8 bored 60 over,Elderbrock headers Cam and Titanium Rockers,750 Twin Pumped Holley Carb and some other goodies.crank dynos over 400HP. | |
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12-20-2007, 12:48 PM
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eBay Motors
#6 (permalink)
| | Member
Join Date: Aug 2007 Location: tennessee
Posts: 56
| I dont know if you are getting any better fuel mileage or not!!! Mine SUCKS also!!!!!!!!!! | |
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12-20-2007, 07:10 PM
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eBay Motors
#7 (permalink)
| | Member
Join Date: Nov 2007 Location: Maryland
Posts: 46
| We have a 08 lmm GMC...bone stock...mostly country driving...17-18 mpg...i drove it to NC on one tank of gas all night dam near never stoped and no traffic...just 75mpg for 8 hours..took about 7/8ths tank got 22mpg 
360miles
__________________ 2004 Chevy Duramax LLY, 2wd Std Cab!!! Banks
-Six Gun Tuner w/ Power PDA
-Ram Air intake
-Monster exhust MBRP Head Pipe http://www.myspace.com/matt112288 | |
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12-20-2007, 07:12 PM
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eBay Motors
#8 (permalink)
| | Member
Join Date: Nov 2007 Location: Maryland
Posts: 46
| oops...it's a 4x4, quad cab, sort bed, 2500HD, 2007, GMC, 15,000 miles
__________________ 2004 Chevy Duramax LLY, 2wd Std Cab!!! Banks
-Six Gun Tuner w/ Power PDA
-Ram Air intake
-Monster exhust MBRP Head Pipe http://www.myspace.com/matt112288 | |
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12-21-2007, 06:57 AM
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eBay Motors
#9 (permalink)
| | Duramax Forum Moderator
Join Date: Feb 2007 Location: Barnesville OH
Posts: 3,445
| Quote:
Originally Posted by SpartanZo6  We have a 08 lmm GMC...bone stock...mostly country driving...17-18 mpg...i drove it to NC on one tank of gas all night dam near never stoped and no traffic...just 75mpg for 8 hours..took about 7/8ths tank got 22mpg
360miles | how the heck did you do that,75MPG   tell me your trick..J/K
__________________ James
05 LLY Chevy LS E/C L/B DRW my older brothers truck now
2006 LBZ GMC SLE C/C S/B,sold the truck to my dad for a business truck
My Truck now,1987 Chevy 2500 350 tweaked,6" SuperLift,350 V8 bored 60 over,Elderbrock headers Cam and Titanium Rockers,750 Twin Pumped Holley Carb and some other goodies.crank dynos over 400HP. | |
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12-22-2007, 05:28 AM
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eBay Motors
#10 (permalink)
| | Junior Member
Join Date: Dec 2007 Location: Dalton, Ga
Posts: 20
| Quote:
Originally Posted by SpartanZo6 ...just 75mpg for 8 hours..took about 7/8ths tank got 22mpg
360miles | Maybe he meant 7.5? C'mon....75!?!  | |
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