11-04-2009, 07:57 PM
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#1
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Registered User
Join Date: Aug 2008
Location: Thibodaux, Louisiana
Age: 26
Posts: 139
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09 Duramax MPG's
My boss is getting around 18.5 mpg with his Duramax on the highway and im getting 22-24mpg on the highway with our shop truck which is an 06 ram dually. He wants to boost the fuel mileage up on his truck so i am wanting facts and opinions on the best combinations of induction, exhaust, and programming.
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11-04-2009, 08:31 PM
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#2
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Vermonter
Join Date: Jan 2007
Location: Vermont
Posts: 46
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Re: 09 Duramax MPG's
Lots of good info here.
IMO a 4" exhaust would work fine 5" if you really wanna make some power. But definately get rid of the DPF.
EFILive for programming or you could use some handheld tuner but EFILive is best
I'm not sure if you even need to do an intake the nbs dmaxes had good intakes. I have had good luck with Volant if you really want one.
By the way if this is like a work truck or something you dont want to highly modify, then go with a mild hp/torque gain or stuff will break.
Good Luck
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2001 ecsb LT 5.3 Volant CAI
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11-04-2009, 08:50 PM
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#3
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Registered User
Join Date: Aug 2008
Location: Thibodaux, Louisiana
Age: 26
Posts: 139
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Re: 09 Duramax MPG's
its my boss's personal truck so it doesnt do much heavy hauling other than his camper which might be 2-4 times a year and not very far. He isnt worried about getting more power just wants to get better mpg's, we have the dodge for hauling.
how does EFILive work? is it complicated?
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11-04-2009, 09:36 PM
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#4
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Registered User
Join Date: Feb 2005
Location: Fresno, Ca
Age: 23
Posts: 87
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Re: 09 Duramax MPG's
I would say get a tuner, and get a 4 or 5" turbo back exhuast and do the PPE airbox mod (Free).... This will get you probably 2-4mpg depending on tune you get... I was getting about 22.5 in my truck when it as stock height....
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2007.5 Chevy Duramax LMM Crew Cab -
Pure Performance Solid Axle Swap (By NorCalTruck). 4 Linked with coilovers, 37" Toyo Mud Terrains on 22" Black KMC Hoss Wheels with Optional Beadlock (Red). Deaver Rear Springs and Bilsteins 5100 Series rear shocks.
Many More MODS to come!
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11-04-2009, 09:55 PM
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#5
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Registered User
Join Date: Aug 2008
Location: Thibodaux, Louisiana
Age: 26
Posts: 139
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Re: 09 Duramax MPG's
PPE airbox mod?
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11-04-2009, 10:01 PM
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#6
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Registered User
Join Date: Oct 2009
Location: Poconos, PA
Posts: 15
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Re: 09 Duramax MPG's
Quote:
Originally Posted by tattoo9483
My boss is getting around 18.5 mpg with his Duramax on the highway and im getting 22-24mpg on the highway with our shop truck which is an 06 ram dually. He wants to boost the fuel mileage up on his truck so i am wanting facts and opinions on the best combinations of induction, exhaust, and programming.
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Wow. Not to hijack, but if you bought a truck you don't need 315 HP and 0-60 in the blink of eye...though it is nice :). But more than anything you want torque. Being able to afford to feed it is nice too. They should be making half tons in diesels...
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11-05-2009, 05:26 AM
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#7
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Registered User
Join Date: Aug 2008
Location: Thibodaux, Louisiana
Age: 26
Posts: 139
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Re: 09 Duramax MPG's
Quote:
Originally Posted by chemist
Wow. Not to hijack, but if you bought a truck you don't need 315 HP and 0-60 in the blink of eye...though it is nice :). But more than anything you want torque. Being able to afford to feed it is nice too. They should be making half tons in diesels...
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half ton diesels are in the works....i am sick of my 14 mpg in my 1500 z71 when had i not listen to my wife i would be driving a diesel getting much better fuel milage and be able to pull way better.
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11-05-2009, 04:41 PM
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#8
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Registered User
Join Date: Mar 2005
Location: TX
Age: 26
Posts: 1,196
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Re: 09 Duramax MPG's
PPE has a web site they sell tuners but have a how to on modding the air box for better flow. EFI is way more in depth then what you need. Get a PPE or quadzilla that can delete the DPF. Of coarse the warranty is going to be void after the mods and not everyone is gaining 2-4 MPG.
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These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health. |
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11-08-2009, 03:46 PM
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#9
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Vermonter
Join Date: Jan 2007
Location: Vermont
Posts: 46
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Re: 09 Duramax MPG's
Ya I would wait till the warranty is up rather than voiding it for a few mpgs.
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2001 ecsb LT 5.3 Volant CAI
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11-08-2009, 09:10 PM
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#10
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From Mini to Fullsize....
Join Date: Oct 2005
Location: Southern Illinois
Age: 27
Posts: 1,368
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Re: 09 Duramax MPG's
Quote:
Originally Posted by tattoo9483
half ton diesels are in the works....i am sick of my 14 mpg in my 1500 z71 when had i not listen to my wife i would be driving a diesel getting much better fuel milage and be able to pull way better.
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yup, 4.5L duramax. I read it about it last year. something like 300hp and around 550ft lbs tq. sounds pretty awesome.
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11-09-2009, 12:53 AM
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#11
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97 Bowtie
Join Date: Nov 2006
Location: Pomeroy, Washington
Age: 21
Posts: 426
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Re: 09 Duramax MPG's
Quote:
Originally Posted by Hotwheelz
yup, 4.5L duramax. I read it about it last year. something like 300hp and around 550ft lbs tq. sounds pretty awesome.
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Last I heard GM dropped this idea after they filed for bankruptcy, unless somebody's heard different.
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1997 5.7 Vortec 1/2 ton * 14 bolt * 5 speed* FLOWMASTER 50series * CB w/ Firestik II *
AirAid Intake * 240,000+ original miles * 285/75r16 Mastercraft AT/2 * Herculined rockers
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11-09-2009, 07:09 AM
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#12
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345 Horse Hemi Killa
Join Date: Jun 2008
Location: Virginia
Age: 26
Posts: 453
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Re: 09 Duramax MPG's
the 4.5 is on permanent hold right now
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2006 Chevrolet Silverado Ext. Cab Vortec Max LT3, 6.0(LQ9), black, K&N intake,
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Leveled with 295/70/17 Terra Grapplers.
93 blackbear tune.  1996 Saturn sl1 5spd 4cyl. 100hp of pure aggression 
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11-09-2009, 11:32 AM
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#13
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From Mini to Fullsize....
Join Date: Oct 2005
Location: Southern Illinois
Age: 27
Posts: 1,368
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Re: 09 Duramax MPG's
bummer..
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11-09-2009, 11:34 AM
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#14
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Forum Leader
Join Date: Nov 2004
Location: Dubuque, Iowa
Age: 27
Posts: 3,823
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Re: 09 Duramax MPG's
There are alot of people that arn't even getting 18.5 mpg on the new duramaxs even after intake, tune and exhaust.
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11-09-2009, 04:18 PM
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#15
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Registered User
Join Date: Mar 2005
Location: TX
Age: 26
Posts: 1,196
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Re: 09 Duramax MPG's
Ya but thats generally because of there speed, over sized tires, or winter fuel.
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These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health.
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11-09-2009, 04:21 PM
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#16
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Forum Leader
Join Date: Nov 2004
Location: Dubuque, Iowa
Age: 27
Posts: 3,823
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Re: 09 Duramax MPG's
No, no and no. Stock tires, 55-70 mph and standard fuel. It is a MAJOR complaint that the newer diesels, not just the duramax, get terrible fuel milage compaired to the older motors.
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11-10-2009, 02:47 PM
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#17
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Registered User
Join Date: Aug 2008
Location: Thibodaux, Louisiana
Age: 26
Posts: 139
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Re: 09 Duramax MPG's
Quote:
Originally Posted by oneloudz71
No, no and no. Stock tires, 55-70 mph and standard fuel. It is a MAJOR complaint that the newer diesels, not just the duramax, get terrible fuel milage compaired to the older motors.
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i do know a few people with the new powerstroke and they are only getting around 14, and i here people saying the new cummins isnt doing too good on fuel milage but my dads 08 get around 20-22
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11-10-2009, 04:54 PM
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#18
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Registered User
Join Date: Apr 2008
Location: 409 TX
Age: 21
Posts: 1,079
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Re: 09 Duramax MPG's
my buddy has a 08 6.4 harley getting 9 lol, that may be due the the 8 inch lift, and the ugly 24 inch rims.
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