Best way to increase fuel mileage - Chevy and GMC Duramax Diesel Forum

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post #1 of 42 (permalink) Old 07-21-2011, 01:13 PM Thread Starter
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Best way to increase fuel mileage

Hello all,

I'm new to the forum, but not new to a Chevy / Duramax truck. This is the 2nd one I've owned and loved both.

I never really had a reason to search out a way to increase fuel mileage until now. I have a 2006 model with 78,000 delicate miles. I don't drive the truck much, but it looks like that's going to change a little as I have just purchased a travel trailer. I usually pull my car hauler with either my old car or a tractor that weights no more than 7,000-8,000# between the load a trailer. Usually these pulls are only up to 3 hours in length.

With the travel trailer, looks like there will be some long distance pulls and I'd sure like to start saving now, rather than later. I've already got my eyes on the replacement 52 gal. fuel tank.

What are the most effective ways to increase fuel mileage? I don't need any crazy programs. My last Duramax was a 2001 model and I had the Edge Juice w/ Attitude and went through a few injectors as I couldn't control myself as I had to have it in level 5 most of the time. The 2006 model is a truck I plan on keeping for awhile and not opposed to too much except for extreme programs.

Thanks in advance from Louisiana.

Gerald

2006 Chevy Silverado LT 4x4 285's 6.6 LBZ D-Max/Ally
2008 Toyota Highlander Hybrid
1999.5 VW Jetta TDI / Panzer Skid Plate / 53 mpgs
1966 Chevy Caprice 2dr Hardtop 496/4L80e/3.73's
Wagons: 18' Car Hauler / 33' SunnyBrook T/T
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post #2 of 42 (permalink) Old 07-21-2011, 01:49 PM
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I cant answer your question directly as I just got my 07' recently, but...

Those 285's will hurt your mileage and filling up a 52 gallon tank will too.

I just back from a trip to nw nebraska, into the black hills of sd. and over to south east sd. and back to omaha.

I averaged 10 mpg to nw nebraska with a 20-25mph head/cross wind and I was traveling about 65 mph.
Going east on i-90 out of the black hills, 70-75 mph I averaged 11.5, no wind.

All this pulling a 25 ft. travel trailer, 5500-6000lbs.

My first upgrade might be a turbo back exhaust, 4" or 5", cat delete.
My wife complained about the heat on the floor board while we were traveling.
When I stopped and looked under the truck, the cat was right under her feet, no wonder.

Then I might look into efi live economy and tow tune.

Hopefully I can get a couple more mpgs with those mods.

Mitch


2007 Chevy LBZ, lt3, ccsb, white, tan leather buckets, 265/75-16 Nitto dura grapplers, MBRP 4" SS.
http://i18.photobucket.com/albums/b1...guna/010-1.jpg
http://i18.photobucket.com/albums/b1...guna/004-2.jpg

1973 laguna 489ci, 600hp, ford 9" 3.89 gears, 400th.
http://i18.photobucket.com/albums/b1...a/e7c3c186.jpg
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post #3 of 42 (permalink) Old 07-21-2011, 02:01 PM
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yeah you guys are on the right track straight pipe it and get efi live with some light tunes and a mileage tune i have heard some people on here saying they have gotten three miles more a gallon do to efi live tuning good luck

Josh-2006 lbz ccLb 4x4 @ 8080 lbs
Performance:diamond eye 5 inch, efi by rob,3 inch dp,Bd manifold,s&b,pvc,afe mp-plugged,air dog ll,edge cts,3 inch boost tube,ppe race valve,alligator trans lines,trans go,pump rub fix
Interior:
weathertechmats,clarion dvd head unit,12"subs,kenwood speakers
Exterior:tint,black lowpro toolbox,halo projector's,5000k hid,moog idler/pitt,rancho shocks,backup camera,cognito 7-9,35s,bmf novas,trac bars,iron bull bumpers,piaa lights
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post #4 of 42 (permalink) Old 07-21-2011, 02:04 PM
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Best way to increase fuel mileage is to......


Lay off the skinny pedal on the right!!!!!

2016 Denali 2500HD CCSB 4X4: Ride Rite air bags, Totron 30" behind grille, Black emblems, Door moldings removed, Moshimoto LED Fogs, 5% rear 25% front doors Solar Guard windshield tint, Husky floor liners. 20X9 Fuel Assault (+1 offset) Cooper STT Pro LT295/60R20. Leveled - Kryptonite uppers, keys, shock extenders
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post #5 of 42 (permalink) Old 07-21-2011, 02:20 PM
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yep full exhuast turbo back delete everthing cat, muffler and egr and efi live is a must if you guys are towing alot you'll love the tow tune with turbo brake i suggest idahorob for your efi needs his site atptrucks.com

2007 ccsb lbz mbrp dp 5'' straight through turbonetics intercooler mbrp 3'' hot side ic pipe sdp s475 over stock twin kit rick d manifolds & uppipes airdogII ported rail fitting race fuel valve dipper 40 over nossles efi live dsp5 by idaho rob pcv reroute bigdipper built trans and probably some other small s#@t that i forgot about Sold
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post #6 of 42 (permalink) Old 07-21-2011, 02:21 PM Thread Starter
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Mitch,

Nice old car that you're building. I realize the 52 gal tank will create more weight, but I much prefer this option rather than putting a tank in the bed of the truck. I like my 6.6' worth of bedspace. The 26 gal tank just doesn't cut it when pulling something on a decently long trip. In reference to the 285's, I know that's my biggest killer. I've been debating on putting 4.11 gears both front and rear to compensate for the larger tire and to get the engine load about back where it's supposed to be. Still haven't decided on that just yet.

Here's something I found before joining this website: DURAMAX MPG INCREASE

Didn't know if anyone had experience with this. I thought of maybe a simple tune and a different air intake system for starters and see where I can go from there.

scottdomine - I don't drive the truck hard. When I pull, I usually don't exceed 65-68 mph on interstate conditions. Normal driving conditions without pulling, I usually never cross 72 mph.

Gerald

2006 Chevy Silverado LT 4x4 285's 6.6 LBZ D-Max/Ally
2008 Toyota Highlander Hybrid
1999.5 VW Jetta TDI / Panzer Skid Plate / 53 mpgs
1966 Chevy Caprice 2dr Hardtop 496/4L80e/3.73's
Wagons: 18' Car Hauler / 33' SunnyBrook T/T
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post #7 of 42 (permalink) Old 07-21-2011, 02:33 PM
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gerald on the lbz you can do a airbox mod that won't cost you anything the write up is on ppe's web site or check out bills custom intakes if you'd prefer to buy one

2007 ccsb lbz mbrp dp 5'' straight through turbonetics intercooler mbrp 3'' hot side ic pipe sdp s475 over stock twin kit rick d manifolds & uppipes airdogII ported rail fitting race fuel valve dipper 40 over nossles efi live dsp5 by idaho rob pcv reroute bigdipper built trans and probably some other small s#@t that i forgot about Sold
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post #8 of 42 (permalink) Old 07-21-2011, 02:35 PM
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actually were you from when i get my twins i have to pull my banks cai off you can have it for 150.00

2007 ccsb lbz mbrp dp 5'' straight through turbonetics intercooler mbrp 3'' hot side ic pipe sdp s475 over stock twin kit rick d manifolds & uppipes airdogII ported rail fitting race fuel valve dipper 40 over nossles efi live dsp5 by idaho rob pcv reroute bigdipper built trans and probably some other small s#@t that i forgot about Sold
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post #9 of 42 (permalink) Old 07-21-2011, 03:09 PM
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best way is buy a honda civic and drive slow!

2003 duramax/bilt Allison EFI live tune, Big head waste gate, 7" grand rock stack, S&B intake, Auto meter gauges, 6" rcd lift, pro comp traction bars, 35" mt MTZ, dale jr. rims de-badged, colour match door handles
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post #10 of 42 (permalink) Old 07-21-2011, 03:12 PM
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Quote:
Originally Posted by Lead_Sled View Post
Mitch,

Nice old car that you're building. I realize the 52 gal tank will create more weight, but I much prefer this option rather than putting a tank in the bed of the truck. I like my 6.6' worth of bedspace. The 26 gal tank just doesn't cut it when pulling something on a decently long trip. In reference to the 285's, I know that's my biggest killer. I've been debating on putting 4.11 gears both front and rear to compensate for the larger tire and to get the engine load about back where it's supposed to be. Still haven't decided on that just yet.

Here's something I found before joining this website: DURAMAX MPG INCREASE

Didn't know if anyone had experience with this. I thought of maybe a simple tune and a different air intake system for starters and see where I can go from there.

scottdomine - I don't drive the truck hard. When I pull, I usually don't exceed 65-68 mph on interstate conditions. Normal driving conditions without pulling, I usually never cross 72 mph.
Thanks, Gerald.
I know what you mean on the 26 gallon tank.
It gets frustrating on long hauls, Im looking into a larger tank also.
I guess the extra capacity tank with fuel would only add a couple hundred pounds.

Mitch


2007 Chevy LBZ, lt3, ccsb, white, tan leather buckets, 265/75-16 Nitto dura grapplers, MBRP 4" SS.
http://i18.photobucket.com/albums/b1...guna/010-1.jpg
http://i18.photobucket.com/albums/b1...guna/004-2.jpg

1973 laguna 489ci, 600hp, ford 9" 3.89 gears, 400th.
http://i18.photobucket.com/albums/b1...a/e7c3c186.jpg
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