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Joined: Sep 2014
Posts: 284
Campfire Member
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Campfire Member
Joined: Sep 2014
Posts: 284 |
I do not believe any of it !
More HP,.... mileage , perhaps a little better ....if not ripping around.
NO one, that is ,no one ,is gonna say not much diff after putting the money inna new chip and exhaust. Work for the epa? I have dyno sheets that the power side. When a diesel is tuned for efficiency you can’t help but increase mileage. No different than playing with timing on an old Chevy 350.
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Joined: Nov 2015
Posts: 5,630
Campfire Tracker
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Campfire Tracker
Joined: Nov 2015
Posts: 5,630 |
Some one mentioned "Fixing " the diesels after warranty is up for better mileage.
That is pure un- adulterated BS. I have been involved in some of these conversions and chips . More power no more mileage .
I don't get any better mileage with my Duramax. I do not keep my foot in it either. Don't know about the GM trucks, other than it cost twice as much to "fix" one of them, vs a Ford "fix". Not sure about additional HP, but I went with a basic computer program that claims over 50hp. I do know for a fact that my mileage immediately went from 13mpg to 17.5... I'll take that all day long. My trailer pulling mpg went from about 11mpg to 14.5mpg. . I usually agree with much you have to say. But Duramax cost no more to fix than a Ford in the long run. Example 7.3 Ford and 6.6 Chevy. Glow plugs on the 7.3 and 6.6. Ford cost five times the dollars. I don't know about the 6.0 Ford or newer, because 6.0 was the last truck Ford will sell me! To each his own opinion!
Last edited by Heym06; 03/04/24.
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Joined: Aug 2004
Posts: 69,616
Campfire Kahuna
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Campfire Kahuna
Joined: Aug 2004
Posts: 69,616 |
Some one mentioned "Fixing " the diesels after warranty is up for better mileage.
That is pure un- adulterated BS. I have been involved in some of these conversions and chips . More power no more mileage .
I don't get any better mileage with my Duramax. I do not keep my foot in it either. Don't know about the GM trucks, other than it cost twice as much to "fix" one of them, vs a Ford "fix". Not sure about additional HP, but I went with a basic computer program that claims over 50hp. I do know for a fact that my mileage immediately went from 13mpg to 17.5... I'll take that all day long. My trailer pulling mpg went from about 11mpg to 14.5mpg. . I usually agree with much you have to say. But Duramax cost no more to fix than a Ford in the long run. Example 7.3 Ford and 6.6 Chevy. Glow plugs on the 7.3 and 6.6. Ford cost five times the dollars. I don't know about the 6.0 Ford or newer, because 6.0 was the last truck Ford will sell me! To each his own opinion! I think we have the term "fix" mixed up. To do the "fix" I refer to on my 2017 F350 6.7 diesel about a week ago, cost $1500. My cousin who has a 3/4 ton Duramax told me to ask about getting his "fixed". My mechanic said he doesn't do GM "fixes" but had a friend who could, if the parts needed were to be had, but the cost of the GM "fix" would be closer to $3k. My cousin took a hard pass at that price. BTW, I was on my tractor today, and stopped by my pickup and started it up to see the avg. mpg as of today... I seems I recollected pretty close.  ![[Linked Image from i.imgur.com]](https://i.imgur.com/5o15f7i.jpg)
Molɔ̀ːn Labé Skýla!
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Joined: Apr 2006
Posts: 9,525
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2006
Posts: 9,525 |
I looked at that fuel usage screen after reading the post. It says 19.7 mpg. My last long trip, 1200 miles, it gave 24.5 mpg by actual computation. I bought this 2005 DuraMax Silverado last January. It’s a 2500 HD. Has that small back seat and the rear doors that open backwards. Fellow I got it from used it to pull a big camper. He put in some sort of chip. 136,000 miles when I got it, and it is like a new truck. What speed and what tires? I’m not claiming at all that you don’t get what you say, just trying to figure out how to get there.
I can walk on water.......................but I do stagger a bit on alcohol.
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Joined: Apr 2006
Posts: 9,525
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2006
Posts: 9,525 |
I do not believe any of it !
More HP,.... mileage , perhaps a little better ....if not ripping around.
NO one, that is ,no one ,is gonna say not much diff after putting the money inna new chip and exhaust. 1.5-2MPG based on 215K Mi pre simplification and 20K post so far.
Last edited by horse1; 03/04/24.
I can walk on water.......................but I do stagger a bit on alcohol.
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Joined: Oct 2007
Posts: 5,468
Campfire Tracker
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Campfire Tracker
Joined: Oct 2007
Posts: 5,468 |
2014 2500 4X4 CC long bed, 14-18 empty, 10-13 pulling a trailer or 5th wheel. Just traded it on a 1500 with the Duramax. 28.5 MPG combined over 1K miles so far. Will see what it does with a small bumper pull.
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Joined: Nov 2003
Posts: 67,706
Campfire Kahuna
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Campfire Kahuna
Joined: Nov 2003
Posts: 67,706 |
I looked at that fuel usage screen after reading the post. It says 19.7 mpg. My last long trip, 1200 miles, it gave 24.5 mpg by actual computation. I bought this 2005 DuraMax Silverado last January. It’s a 2500 HD. Has that small back seat and the rear doors that open backwards. Fellow I got it from used it to pull a big camper. He put in some sort of chip. 136,000 miles when I got it, and it is like a new truck. What speed and what tires? I’m not claiming at all that you don’t get what you say, just trying to figure out how to get there. Running no more than 75 on new Firestone 245/75R16 tires
Sam......
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Joined: Oct 2003
Posts: 1,390
Campfire Regular
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Campfire Regular
Joined: Oct 2003
Posts: 1,390 |
2024 3500 about 18’ish. As high as 21 but as low as 10/11 depending on the load. You could expect around 18 without a trailer. Pretty much spot on with my 2011 as well. Towing my 11k lb boat I get 10-11 towing. 14k lb toy hauler drops to about 9.
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Joined: Dec 2005
Posts: 5,924
Campfire Tracker
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Campfire Tracker
Joined: Dec 2005
Posts: 5,924 |
2022 Chevrolet 2500 4x4
Have gotten 8 to 22 mpg. Towing 14K pounds to empty running @65mph with a strong tail wind.
Wind and idle time are a big factors also.
Arcus Venator
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Joined: May 2005
Posts: 1,697
Campfire Regular
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Campfire Regular
Joined: May 2005
Posts: 1,697 |
I've got a '18 Denali. Getting 16-18 city and 22-24 hwy empty. What highway speeds? Are you using AT or highway tread type tires? I see folks saying they get over 20MPG w/3/4 and 1Tn diesels, but I've never seen it play out at the pump. In 350K Mi myself between 2 F250's, a 6.0L and 6.7L (w/3:31 gearing) I've never gotten either of them to make 20MPG+ over say a 200+ Mi all highway trip. That said, our interstate speed limit is 75 and I drive 79-80MPH with the cruise set, 75MPH on the non-interstate 4-lanes, and 70MPH on 2-lane highways. Maybe 60MPH and highway tread would get me to 20+? I'm not saying it can't be done, I'm just wondering how others make it happen? Some one mentioned "Fixing " the diesels after warranty is up for better mileage.
That is pure un- adulterated BS. I have been involved in some of these conversions and chips . More power no more mileage .
I don't get any better mileage with my Duramax. I do not keep my foot in it either. Give or take, +1.5-2MPG on the highway eliminating DPF and EGR with tires and speeds remaining basically same/same. My hwy milage is running 70 mph. Running Michelin LTX tires inflated to 65/75 psi. Two years ago we went to Yellowstone and the Tetons. Just followed speed limits, including SD and WY 80 mph with engine braking in the mtns.. Trip was 3400+ miles and mpg average was 20.7. Florida trip included Smokey Mts.and Bourbon trail. Trip was 2576 miles and mpg average was 21.8. I've been told that some Duramax gets better mileage than others. Don't know if there is any truth to that.
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Joined: Oct 2009
Posts: 7,685
Campfire Outfitter
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Campfire Outfitter
Joined: Oct 2009
Posts: 7,685 |
I have a 09 Ford F350 CrewCab 4x4 about 100,000 KM i chipped it and increased my milage about 15 % or better , i do not use position 2 or 3 just keep it natural above 60 MPH fuel goes south. my normal truck weight is 9460 lbs or 4300KGs so i am always heavy. To increase my milage i went to 35 inch tires which increased my milage about 2.6%.
with the diesel and 35s there is no appreshial drop in torque or towing ability . Iam at 227,000 miles and still going strong.
Norm
There is not enough darkness in all the world to put out the light of even one small candle----Robert Alden .
If it wern't entertaining, I wouldn't keep coming back.------the BigSky
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Joined: Apr 2001
Posts: 1,389
Campfire Regular
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Campfire Regular
Joined: Apr 2001
Posts: 1,389 |
Mine is an 01 Siverado duramax. 4x4 crew cab long bed dually and I keep a slide in in it full time. Average mpg runs 10 to 13 but when I watch my r foot Ive gotten up to 16.5. Around 170k on it.
I'm not cheap, I'm frugal. ![[Linked Image]](http://militarysignatures.com/signatures/member501.png)
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Joined: Jun 2001
Posts: 19,074
Campfire Ranger
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Campfire Ranger
Joined: Jun 2001
Posts: 19,074 |
2019, 2500 HD: 22-23, empty on open roads, 16-18 around home, in to town, 12-14 loaded pulling a horse trailer, all about18,00 pounds
If God wanted you to walk and carry things on your back, He would not have invented stirrups and pack saddles
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Joined: Apr 2006
Posts: 9,525
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2006
Posts: 9,525 |
2019, 2500 HD: 22-23, empty on open roads, 16-18 around home, in to town, 12-14 loaded pulling a horse trailer, all about18,00 pounds How are you liking your new Nitto Exo's?
I can walk on water.......................but I do stagger a bit on alcohol.
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Joined: Apr 2010
Posts: 10,831
Campfire Outfitter
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Campfire Outfitter
Joined: Apr 2010
Posts: 10,831 |
I get 15
I also have a tuner
Maker of the Frankenstud Sling Keeper
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