|05-30-2013, 07:29 PM||eBay Motors #11 (permalink)|
Join Date: Sep 2011
-2006 GMC CCSB LBZ
EFI LIVE DSP5, Big Dipper Trans, Fass Titanium 150, PCV ReRoute, PPE Race Valve, Alligator Trans Lines, Dirty Hooker Stainless Power Steering Lines, 4" Plumbing + Diamond Downer, Bullydog Outlook, Retrax Cover
-2004 Grand Prix GTP
-2008 Pearl White Streetglide
|05-30-2013, 07:37 PM||eBay Motors #12 (permalink)|
Join Date: Mar 2012
Location: Casper, Wyoming
19-23 on the highway at 65-80 mph, speed dictates. Towing depends on speed and weight, at 75mph and 10k lbs I get 11.5-12.
2007 CCSB LBZ.
EFI live DSP 5 by Rob @ ATP
EGR blocked, PVC reroute
AirDog II 165
TransGo Jr/pump rub mod
Edge Insite CTS w/ backcam
69 Camaro S/ST-S/Gas
|05-30-2013, 08:28 PM||eBay Motors #13 (permalink)|
Join Date: Nov 2012
Location: Monroeville, Alabama
Before the tires I was getting 19-21 out on the road and around 15-16 in town. Now it's about 18+\-mpg on the road and around 12 to 14 in town depending on my driving mood swings
2012 Chevy LTZ 2500HD
Leveled with stock 20's on Toyo MT's
H&S Mini Maxx running Kory's custom tunes
5" Flo Pro exhaust
|06-02-2013, 06:01 AM||eBay Motors #15 (permalink)|
Join Date: May 2013
The info here seems to be dead on with the numbers Im getting as well. 2013 crew cab 2500hd 4x4. 18.2 in typical hilly TN "backroads". I havent had a chance yet to put her on the interstate and see what she does, but from the numbers Im seeing, Im expecting 20+ pretty easy.
|06-02-2013, 06:28 AM||eBay Motors #16 (permalink)|
Join Date: Jan 2007
Location: Great Falls, MT
Highway cruising 75-80 w/cruise I get 18.5-19
In town, probably 13-14
When I am towing my 5th wheel (14,000) cruising 70-75 I have been averaging 10.2-11.4 depending on the number of continental divides I have to cross!
2006 GMC Sierra CC SB LBZ, 68,000 and climbing
EFI Live, EGR Blocker Blocked...
2008 Chevrolet Suburban
1991 Chevrolet 1500 Step Side
2003 GMC LB7 CC/LB (sold)
|06-02-2013, 07:38 AM||eBay Motors #17 (permalink)|
Join Date: May 2011
Avg hwy 18, city avg 14, & towing avg 9.
2009 Sierra 2500 HD LMM SLE CC/SB 4x4
EFI Live, EGR disabled, Flo~Pro 4" DP back exhaust w/muffler & trumpet tip, Pacer LED NBS cab lights, Putco yellow bulb fog lights, GM dually rear light bar, Cobra 29 WXNWST CB radio, Footwell lights, Kenwood speakers, Tinted windows, GM chrome oval running boards, Fumoto oil drain valve, Bilstein 5100 shocks, Michelin M/S2, PY0 wheels, Rubber mud flaps, Curt class IV hitch, Wilson 2000 CB antenna
2000 Silverado 1500 LS RC/LB 4x2 stock. (Work Truck)
|06-02-2013, 09:33 AM||eBay Motors #18 (permalink)|
Join Date: Apr 2013
DIC Shows 19
Hand Calculated 18.5
DIC Shows 14
Hand Calculated 15
DIC Shows 16.5
Hand Calculated 16.7
These are all averages. All stock with about 200-300lbs of tools at all times and running 285/70/17.
Sent from AutoGuide.com Free App
2008 GMC Sierra CCSB
EFI LIVE FROMKory Willis and a 5" MBRP straight kit will soon be installed... waiting till warranty is gone!
Still need to order SDP's EGR delete kit...
"There is no greater threat to the tree of liberty than an uninformed, uneducated, and timid people. Through history liberty has always been destroyed by the aforementioned and their rulers."
|06-02-2013, 02:10 PM||eBay Motors #19 (permalink)|
Join Date: May 2013
Location: Adams Township, PA
I never trust the DIC! I have always hand calculated my mileage. My 04 LB7 would routinely get between 11-13 city/western pa backroad driving, and between 19-21 highway driving empty. Between 10-12 city/backroad and 17-19 highway loaded.
Now, my 13 LML blows that out of the water so far! Keep in mind that as of typing this I have only 3200 miles on it, but so far my hand calculations are as follows. Between 13-15 city/backroad and up to 27 on the highway!!!
Just yesterday I had to drive up to Painesville Ohio. Topped off the tank before I left. I have the 36 gallon tank. Took I-79 to I-80 to Ohio 11 to US-6 to Ohio 608 as my route. Round trip of 267 miles, and burned just two butthairs over 1/4 of a tank for the whole trip. I calculated this trip out to 26mpg. This was also factoring in the added 1100lbs of cabinetry I had crammed in the bed.
So, to answer the OP's question... It depends on the persons driving habits, the roads, and speeds. Brand new, I am actually not surprised my LML is getting as good of mileage as it is... I am pretty sure what I am getting now, is about as good as it is going to get. ANYONE tells you they are getting better than 30 highway, or say... 20 city... Call bull$hit!!! LOL
13 EC/SB Silverado LT
Stock, for now...
|06-03-2013, 01:15 PM||eBay Motors #20 (permalink)|
Duramax Lifetime Supporter
Join Date: Aug 2008
Absolute best I have ever got is 20.6 MPG. That was empty highway miles at 60 miles an hour. I let the wife drive home that trip and now I have to listen to her tell me I need to slow down so we can get better mileage! Best I (myself, not the wife)have gotten is 19.8 empty, that was driving about 68 with a slight tail wind. I usually get about 16 -17 around home, that is mixed freeway and in town.
Towing a 7500 lb travel trailer, I get 11-12 MPG usually, depend on the hills I have to go over. Have got as low as 9 once with mostly in the hills but I don't slow down much going up hill.
2005 Chevy Silverado 4x4, 285-70-17's on Hummer wheels. Banks Air inlet system w/scoop. Predator programmer, modified mouth piece.
93 Dodge D250, PDR Twins HX35&HT3B, 60+# boost,PDR stage 2 head w/o-rings, PDR Cam, modified VE Pump, piston style lift pump, modified 5" intake w/AFE, ATS ported manifold,DTT 89% converter, 4" RIP exhaust,modified tranny,EGT/boost/tranny/tach gauges.Rear sway bar.Single stage Water/Meth system installed. Oversized intercooler