What kind of hwy mileage are people getting? - Page 3 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax Sixth Generation: 2017+ (L5P)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise

Duramax Sixth Generation: 2017+ (L5P) Discuss the sixth generation (2017+) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Like Tree34Likes

Reply
 
LinkBack Thread Tools
Old 08-22-2018, 07:27 PM   #21 (permalink)
JBear
Clutch
 
JBear's Avatar
 
Join Date: Jun 2016
Location: New England
Posts: 55
iTrader Score: 0 reviews

I've never broke 23 with my Dodge... just sayin' LOL

__________________
-Jess
'18 LBZ 3500 LP5~ Cancelled!
'15 LBZ 3500HD Z71~ 155,ooomi. and counting; Considering options
'98 Ram 2500 6.0L 12V~ 583,ooomi. and parking; Towing twins, ported head, balanced motor, custom cam, benched pump, too much trans to list, yadda yadda yadda...
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-22-2018, 07:43 PM   #22 (permalink)
clarythedrill
Block Heater
 
Join Date: Jul 2015
Posts: 17
iTrader Score: 0 reviews

Within the last month I have taken two long distance trips. First from Chicago to Charleston, SC and back. Second from Chicago to Killeen Texas and back. Both trips with the A/C on and going about 3-5 mph over the posted speed limit, so averaged about 75 on all trips. On both my hand calculated MPG was anywhere from 21 to 23, depending on the hills, or lack thereof. I am extremely happy with the overall performance of my '17 model, which is currently sitting at just under 18,000 miles.

Offline   Reply With Quote Quick reply to this message
Old 08-22-2018, 10:55 PM   #23 (permalink)
maxinDixon
Diesel Boss
 
maxinDixon's Avatar
 
Join Date: Oct 2003
Location: Coeur d' Alene, ID
Posts: 1,232
iTrader Score: 0 reviews

Quote:
Originally Posted by 1thackattack View Post
Lol, not seconds, it lasted for quite a while once i had been driving on the freeway for a little
Downhill of course with a tail wind lol. Last trip from CDA to granby CO 20.0. CDA to Santa Clara, CA and back 20.0 and that with an LML going 80 much of the time,
__________________
Chevy '16 2500HD LTZ CC, stock...for now. Morimoto HID.
GMC '04 2500HD SLE CC D/A LB7 SB Summit White, LineX, Nicktane, JK headlight harness and fuel pump with harness, HIR lowbeams, Banks exhaust, EFI Live, Horn mod, Suncoast 6 speed conversion, injectors at 112,265, injector #8 replaced at 136,078 and again all 8 at 168,368.

VW '01 NB TDI 6 spd ERF, Bosio DLC520 nozzles, Malone stage 2 tuning. Driving made fun!
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 09-06-2018, 11:53 AM   #24 (permalink)
steakman
Diesel Superstar
 
steakman's Avatar
 
Join Date: Mar 2007
Location: Home/Wrk: Calgary
Posts: 3,744
iTrader Score: 2 reviews

Ontario Diesel Place Chapter Member

Alberta Coal Rollers Member

yea some pretty impressive claims to be sure.

Add in your Regen and then re-do this thread. Add cost of DPF fluid.
Then lets see where you guys are at.?

for the record - Truck wiht me in it, Tool box - Full Titan & slip tanks - ~8000lbs
Hiway at 75 . 20 - 21 avg.
Towing 12k 5r . 10.0 avg. (BC Mountains)

EFI Live on 3 (45hp)
265/70R-17 BFG Rugged Trails
No Lift - levelled

Calculated
__________________
06 LBZ CCSB SLE/T
Blanco
(all mods - in my garage),
352,270 miles (566,925km)..
Orig: Injectors/cp3
HG's - ARP Studs: Sep '15..

Pulling a 2003 Canadian Built - Citation 26RKS 5th Wheel

Alberta Coal Roller Member Numero Uno


Last edited by steakman; 09-06-2018 at 11:56 AM.
Offline   Reply With Quote Quick reply to this message
Old 09-06-2018, 07:32 PM   #25 (permalink)
oldschoolbowtie
Diesel Nut
 
oldschoolbowtie's Avatar
 
Join Date: Jun 2017
Location: Orlando Fl
Posts: 908
iTrader Score: 0 reviews

Quote:
Originally Posted by clarythedrill View Post
Within the last month I have taken two long distance trips. First from Chicago to Charleston, SC and back. Second from Chicago to Killeen Texas and back. Both trips with the A/C on and going about 3-5 mph over the posted speed limit, so averaged about 75 on all trips. On both my hand calculated MPG was anywhere from 21 to 23, depending on the hills, or lack thereof. I am extremely happy with the overall performance of my '17 model, which is currently sitting at just under 18,000 miles.
those are awesome numbers
__________________
Al


2007.5 3500HD Silverado LTZ
Kennedy Custom Tune Banks Intake and 4 " exhaust, Air Dog 150, Leveled front end, aftermarket upper control arms, tie rod end sleeves, bypass oil filter, Pusher 3" "hot side" charger tube, aFe Turbo inlet pipe, PPE deep Trans Pan with temp gage, 2 low mod for front differential disable, PACBRAKE 5000# Air Bags with remote on board air...otherwise stock


1953 Chevy truck 496 2 NOS kits ...otherwise stock


1927 Roadster 383 2 NOS kits chassis car (street legal)// otherwise stock
Offline   Reply With Quote Quick reply to this message
Old 09-07-2018, 06:54 PM   #26 (permalink)
clarythedrill
Block Heater
 
Join Date: Jul 2015
Posts: 17
iTrader Score: 0 reviews

Quote:
Originally Posted by steakman View Post
yea some pretty impressive claims to be sure.

Add in your Regen and then re-do this thread. Add cost of DPF fluid.
Then lets see where you guys are at.?

for the record - Truck wiht me in it, Tool box - Full Titan & slip tanks - ~8000lbs
Hiway at 75 . 20 - 21 avg.
Towing 12k 5r . 10.0 avg. (BC Mountains)

EFI Live on 3 (45hp)
265/70R-17 BFG Rugged Trails
No Lift - levelled

Calculated

What do you mean by "add in your Regen and then re-do"? The amount of fuel used during regen is already in the calculation.
Offline   Reply With Quote Quick reply to this message
Old 09-11-2018, 11:28 AM   #27 (permalink)
Meathead
Diesel Apprentice
 
Meathead's Avatar
 
Join Date: Jul 2006
Location: Upstate SC
Posts: 329
iTrader Score: 0 reviews

I love all the insanely high mileage numbers. Somebody averaging 20+ mpg in a 8,000+ lb truck kinda cracks me up, 'cause it's obvious the truck isn't working. I'm all about freedom - if you can afford it, and that's what you want to drive and want to do with it, have at it.

I'm also all about OCD..

My '17:

80,922 miles

5,048 pulling an 8.5'x16' enclosed trailer, averaging approx. 5,000 lbs

19,142 pulling a 28' GN, loads all over the map, from approx. 6,000 empty, to roughly 20,000 lbs of trailer, skid steer loader, and attachments - roughly half of those miles loaded, and half empty

3,187 pulling a 36' fifth wheel


6,193 gallons of fuel
125 gallons of DEF


I've seen the 50-mile average numbers in the neighborhood of 20 mpg when running empty, but when you do other things with it, that number is meaningless. The concern over mpg is primarily a financial matter - cost of fuel per mile, per year, etc. This works out to a very tiny hair over 13 mpg for it's now 20-months-and-five-days career. Given what I've accomplished with it, I'm more than happy with that.
__________________
'17 CC DRW L5P GMC Denali in Summit White - delivered 01.06.17 w/ 18 miles on the clock - 5% tint all around - de-badged by Armando - ATTA AT90L-TT aux fuel tank/tool box, custom install by me, Allison deep pan full of Transynd, 55psi Crossfire caring for 255/80-17 Toyo OC ATIIs.. 110,000 miles and counting..

'07 CCSB LBZ Silverado Classic, 482,708 miles. Purchased 10.06. Retired 01.06.17, sold to my buddy in MS - happy I was able to keep it in the family.

Last edited by Meathead; 09-11-2018 at 11:29 AM.
Offline   Reply With Quote Quick reply to this message
Old 09-24-2018, 11:29 AM   #28 (permalink)
ata9977
Diesel Fanatic
 
ata9977's Avatar
 
Join Date: Dec 2009
Location: Omaha, NE
Posts: 124
iTrader Score: 0 reviews

I am just over 1,300 miles on my 2018 and in mixed city/hwy driving am seeing 13._ MPG.

the Same type of driving in the LMM I sold was right around 15.5MPG
__________________
2018 Silverado High Country L5P


SOLD - 2007.5 GMC CCSB SLT Z71 - EFI Live w/DSP5 - AFE 4" w/ muffler - EGR Blocked - PCV Re-Route - Leveled - 20x9 MB Wheels - 305/55/20 Nitto TG's - Small Fender Mod - Edge Insight CTS - Cognito UCA's - Rancho
Offline   Reply With Quote Quick reply to this message
Old 09-27-2018, 05:59 PM   #29 (permalink)
moosetags
Clutch
 
moosetags's Avatar
 
Join Date: Mar 2011
Location: Santa Rosa Beach, Florida
Posts: 51
iTrader Score: 0 reviews

We recently completed a 73 day, 11,500 mile trip from Florida to the Pacific Northwest and back. 7,600 miles were done pulling an 8,000# Airstream travel trailer. Our average mileage for the whole trip was 13.26 mpg and the average price per gallon of Diesel was $3.24.

Brian
__________________
Brian McCabe
Santa Rosa Beach, Florida
2018 Chevrolet Silverado LTZ 2500
Duramax/Allison
4x4 - Crew Cab - Standard Bed
Single Rear Wheel
Offline   Reply With Quote Quick reply to this message
Old 10-05-2018, 09:04 PM   #30 (permalink)
Coolbreeze
Diesel Champ
 
Join Date: Jun 2006
Location: NW NJ
Posts: 1,584
iTrader Score: 0 reviews

Overall life time average is right at 16.2 with about 15% of the mileage towing.
Maybe 30 % highway and the rest local.

As for highway mileage I would say I'm at about 19mpg. I some times see 24 on the lie-0-meter and right then a regen will kick in and it will go to 22 yet when I actually buy fuel and hand calculate it I see like 19mpg to 20 mpg. I have yet to ever have one full tank run highway all the way.

__________________
'17 L5P Silverado 2500HD, CC/SB, LTZ

'06 LBZ Silverado 2500HD, CC/SB, LT2 SOLD
Never left me walking!!!!
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Mileage lynn1130 Duramax Fifth Generation: 2011-2016 (LML) 16 06-11-2017 01:19 PM
LMM: Poor fuel mileage with EFILive... Whats the deal??? Texas_Diesel Duramax Fourth Generation: 2007.5-2010 (LMM) 10 03-10-2017 01:25 PM
22 People Killed at Mall Tom S. Off Topic 18 08-02-2016 10:57 AM
Fuel mileage decrease tbeers11 Duramax Fourth Generation: 2007.5-2010 (LMM) 21 04-27-2016 06:43 PM
LML: Lml fuel mileage korai Willis /deleted/ 135boom3 Fifth Generation Duramax Electronics/Tuners 11 09-18-2015 11:31 AM


All times are GMT -4. The time now is 12:46 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide