Jump to content

31 MPG is this for real? 2017 6.2 Denali

wildlyfe200

Recommended Posts

jagabom (Esquire) Enthusiast

jagabom (Esquire)

Posted
Posted

I think all vehicles should be mandated by law to show instantaneous and average gas consumption.  My WT only has average.  By looking at instantaneous once in a while, you really see how much gas you burn by flooring it and driving hard.  

Jim

  • Replies 101
  • Created
  • Last Reply
truckguy82 Senior Enthusiast

truckguy82

Posted
Posted
On 12/19/2017 at 5:43 AM, CadillacLuke24 said:

Sure, these are from the DIC, so some may say these numbers are exaggerated. While that may be true, I'd put my money on the screen connected to the PCM, which monitors both the injector flow rate and hub rotational speed, over any hand calculation. 

Lol @ hand calculation comparison

 

It’s actually all calculated by machine, the only thing done “by hand” is basic division.

 

I have some news for you
 

The guys that hand calculate, need to get their volume of fuel from somewhere, they get it from the multi thousand dollar device which only has one single solitary purpose, is regulated by the governent, and repeatedly check for accuracy.....known as the gas station pump....it is probably just a little more accurate than your ecu figuring out volume used through an algorithm who’s data inputs are based on thousands of little fuel squirts into the engine.

 

I trust the DIC to be close, but what on earth are you thinking trusting it more than hand calculations

Ozer Enthusiast

Ozer

Posted
Posted

Cant look at the last 25 miles, too short of a distance to get accurate averages. Look at the last 400 miles or the full tank/hand calculations.

That will be your true MPG. You can be going on a slight decline on a highway in V4 mode for the last 25 miles and get well over 30mpg, that doesnt mean your truck gets that MPG.

ES44AC Enthusiast

ES44AC

Posted
Posted

This is the best I've got with my 2018 Silverado 6.2l . This was running in eastern NC where it's really flat running no more than 65 mph and starting off really easy.  I don't get nothing like this in the foothills of NC.

 

20190613_115222.jpg

  • 4 weeks later...
CadillacLuke24 Enthusiast

CadillacLuke24

Posted
Posted
On 12/9/2019 at 3:48 AM, truckguy82 said:

Lol @ hand calculation comparison

 

It’s actually all calculated by machine, the only thing done “by hand” is basic division.

 

I have some news for you
 

The guys that hand calculate, need to get their volume of fuel from somewhere, they get it from the multi thousand dollar device which only has one single solitary purpose, is regulated by the governent, and repeatedly check for accuracy.....known as the gas station pump....it is probably just a little more accurate than your ecu figuring out volume used through an algorithm who’s data inputs are based on thousands of little fuel squirts into the engine.

 

I trust the DIC to be close, but what on earth are you thinking trusting it more than hand calculations

The range calculator has time and time again proven to be accurate within a couple of miles. If that is spot on, I trust the fuel economy calculator. I'd trust it more than anything the government certifies. Sure, the gas pump is checked repeatedly for accuracy. By the government. Somehow that is less reassuring to me. 

 

Besides, hand calculations are based on how much fuel is pumped into the tank, which does not always equal what is pumped out. That's happened a few times before, I go to fill a partial tank to get to my intended destination, fill what I calculate to be sufficient, and I end up overfilling. 

 

But that's just my personal views. YMMV. 

 

truckguy82 Senior Enthusiast

truckguy82

Posted
Posted
On 12/9/2019 at 11:27 AM, ES44AC said:

This is the best I've got with my 2018 Silverado 6.2l . This was running in eastern NC where it's really flat running no more than 65 mph and starting off really easy.  I don't get nothing like this in the foothills of NC.

 

20190613_115222.jpg

Pretty much exactly what I get on dead flat surfaces at that speed in my ‘14 6.2

Z45 Senior Enthusiast

Z45

Posted
Posted

Well if you believe 31 mpg is real then you should get 800+ miles to a tank of fuel (26x31) .  Let us know when that happens.  An average over many thousands of miles (5,000, 20,00o miles etc) is more realistic of real mileage.   

diyer2 Senior Enthusiast

diyer2

Posted
Posted

I call B.S.

22 minutes ago, elcamino said:

Well if you believe 31 mpg is real then you should get 800+ miles to a tank of fuel (26x31) .  Let us know when that happens.  An average over many thousands of miles (5,000, 20,00o miles etc) is more realistic of real mileage.   

We have a new 2019 Honda CR V with 1.5 L turbo.

First fill up netted 27.3 MPG.

Hand calc.

:)

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
7 hours ago, CadillacLuke24 said:

The range calculator has time and time again proven to be accurate within a couple of miles. If that is spot on, I trust the fuel economy calculator. I'd trust it more than anything the government certifies. Sure, the gas pump is checked repeatedly for accuracy. By the government. Somehow that is less reassuring to me. 

 

Besides, hand calculations are based on how much fuel is pumped into the tank, which does not always equal what is pumped out. That's happened a few times before, I go to fill a partial tank to get to my intended destination, fill what I calculate to be sufficient, and I end up overfilling. 

 

But that's just my personal views. YMMV. 

 

And the reason to use averages over multiple tanks. The more tanks the more accurate the result. There are dozens of reasons for variation and statistics is the only way to sort it out with a high degree of probability. Here's nearly a 100,000 miles of reasons single tanks measured by any means are poor indicators of anything meaningful. Even the eighteen tank yellow average has but a seasonal implication. It also has been showing an annual gain! Within a season you can see some pretty wide swings whose results depended on conditions for that tank. Wind, temperature, speed, …...my wife's mood that day. 

 

All I can say with certainty what was. 28 mpg over this charts time frame.

 

25 mile 50 mile even 400 miles tells me nothing I could hang my hat on. My average tank is 400 miles. 

 

PeppersMPGHistory.thumb.png.98fdabc30012e1c88ec5be170fee7785.png

Z45 Senior Enthusiast

Z45

Posted
Posted

People will believe 25% of what a stranger says (sales person).

55-75% of a friend ...BUT

They will always believe 100% of what they tell themselves...

truckguy82 Senior Enthusiast

truckguy82

Posted
Posted
19 hours ago, elcamino said:

Well if you believe 31 mpg is real then you should get 800+ miles to a tank of fuel (26x31) .  Let us know when that happens.  An average over many thousands of miles (5,000, 20,00o miles etc) is more realistic of real mileage.   

Who on earth drives on a flat road for 100’s of miles with cruise set on 59mph.

 

obviously that is not a realistic long term average. Lol at feeling the need to even bring it up.

Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
5 hours ago, truckguy82 said:

Who on earth drives on a flat road for 100’s of miles with cruise set on 59mph.

 

obviously that is not a realistic long term average. Lol at feeling the need to even bring it up.

You would just HATE riding with me. I drive for thousands of miles, cruise set at 55 MPH.

I just can't control the road elevations yet but I'm working on it.

 :crackup:

KARNUT Senior Enthusiast

KARNUT

Posted
Posted

You would just HATE riding with me. I drive for thousands of miles, cruise set at 55 MPH.

I just can't control the road elevations yet but I'm working on it.

 :crackup:


I think 70 on the interstate is fast enough, I do go a little faster sometimes. Our secondary roads in some cases are too fast. I don’t know what they’re thinking. The double nickel, I’d be drooling with boredom. You must have the patience of a saint.


Sent from my iPhone using Tapatalk
Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
3 hours ago, KARNUT said:


I think 70 on the interstate is fast enough, I do go a little faster sometimes. Our secondary roads in some cases are too fast. I don’t know what they’re thinking. The double nickel, I’d be drooling with boredom. You must have the patience of a saint.
 

Boredom is a state I rarely experience. Like never. Had a nine year old daughter of a girl I dated once tell me boredom is the state of "Not Entertained". My mind is way to active for that silliness. I've never required external motivation either so have a hard time understanding the carrot and stick crowd. Ya know the type, they look at you and ask "What's in it for me"? Not a question I see I need to ask someone else. It's a question I need ask myself. How does is benefit me. The list in this case is long. SO it isn't patience so much as I see a benefit in it. 

 

I find in my case that every time I said 'screw the cost', it cost me more than I was ever willing to pay.

Divorce ring a bell? 

:crackup:

 

 

 

 

 

 

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Deadwood
      primary drive belt tensioner

      By Deadwood · Posted

      I bought belts and pulleys for my '20 L5P at Rock Auto a couple years ago. I have used them for many years, and almost always save significant money, especially when I buy maintenance stuff ahead of time.   They carry many OEM parts, which is all I use unless an aftermarket is shown to be same/superior, or if it is an insignificant part or unavailable OEM part anywhere else. RA is usually lower priced, often by a bunch, but parts are sometimes unavailable or out of stock, and I do shop around and sometimes find better prices at other sites.   Be aware that you pay shipping, and if you buy multiple items and they are coming from different warehouses, the shipping can kill the advantage. Planning ahead is best if possible.   If you have a transmission service in the near future, check out their OEM (AC Delco ULV) fluid, usually MUCH less than anywhere else.
    • Deadwood
      10L1000 anyone with High Mileage ? I hate Damocles....

      By Deadwood · Posted

      New member here, very long time occasional guest. Saw this thread, thought it would be a good time to contribute someting. It is only my experience and not a claim that everyone will have the same.   I bought my '20 3500 L5P new and have put 99.9% (literally) of it's current ~400k miles on it myself, with over 50% of that towing loads between 4k to 15k, and to me this truck has been nothing short of amazing. For the first 235k I had zero issues, and from there until 321k I replaced a NOx sensor, two failing glow plugs, and three of the notorious injector connectors. I believe this truck is in part, a testament to good luck, but also good care and following a decent maintenance schedule (I also keep meticulous records.) As a result, it looks as good as a well cared for 70k rig, up and down, inside and out.   At some point before that 321k mile mark I began to get a little spooked about the 10L1000, especially the valve body. Word of mouth about potential issues prompted me to jump on the net to sift through all the noise and determine what all the fuss was about. I routinely take long trips, coast-to-coast and points in between, so roadside breakdowns can be '...a thousand miles from nowhere' and a bit of a challenge, and though I had no issues, my guard was up and activated.   And then I stumbled across a chance to salvage some parts off a new 2025 that had been wrecked in transport. I grabbed a few wear items (alternator, pulleys, etc.) and on a whim asked what the ten speeder would cost me. It was cheap...really cheap. I knew some changes had been made in the '24+ version 10L and were supposedly not compatible, but I called service/parts at my local Chevy dealer and asked why and they didn't know. A call to a well known aftermarket transmission outfit revealed it was very likely it would be fine, but to them not 100% sure.   Because it was cheap (really cheap) and I was spooked, I took the chance. Had it installed by a local shop and it worked like a champ, shifted just like the original. At it's first service at 37k, I had the shop put in a Next Gen valve body kit, which after some initial hiccups and rough shifts, smoothed out though with somewhat firmer shifting.   All that said, I have a very serious concern about my newer transmission as just two weeks ago it suddenly began to exhibit a strong reluctance to engage forward or reverse. It was a bit past due anyway so I took it in for service. The reason it was sticking was due to 'glitter' in the fluid clogging the filter...not good folks, often indicates a converter giving out. We ended up going ahead with the new filter and fluid, first to see if it would move and shift, and then if so buy me a little time. It did, and I've driven it over a thousand miles and it is shifting smooth, no noises or slipping. Regardless, it looks like a third gearbox is in my future so I can resume taking long trips with some confidence. In the very short term, my curiosity will have me examining the fluid to check how much glitter has reappeared.   An earlier poster had alleged, in the context of 10L100 failures, that it is another example of how we seasoned citizens somehow descend into hysteria, lose control of our senses, and react irrationally after brief encounters with the idiocy of the internet infosphere. Let me say (and I have used and abused said internet since it's infancy) there is no segment of the populace that has a corner on over-reaction to digital garbage. Just as my offering of experience in this arena is purely anecdotal and should not be considered gospel or all-encompassing, I believe it is still worthwhile information to consider, along with other relevant anecdotal experiences about things like complex transmissions, especially when balanced with other sources.   So to answer the original question, yes I got high miles out of my first 10L, trouble free for 321,000. Now I really wonder how much longer it would have went. Did I 'overreact' to the internet ghouls by replacing a 'good' one with a 'bad' one? Maybe. Who knows, the thing might have taken a puke a 100 miles later. So I'll just fix it again, then move on and start thinking about all the other stuff that will eventually wear out. It still has the original brakes (they're at ~60%), original injectors/pump, turbo, water pump, etc....pretty much original everything. Knock on wood.
    • swathdiver
      6 Speed vs 8 Speed

      By swathdiver · Posted

      At peak temperature.  They get to cool down and warm up more, especially those with the external cooler.  I have three GMT900s and one of them has over 225K on its original transmission.  Fluid gets changed about every 36K miles, all of it.     It's not the bean counters, it was the government.  They had to meet CAFE standards and other government requirements.   To get around that, we tune them and modify them to our liking.
    • GMCustomerService
      Will not stay in Reverse

      By GMCustomerService · Posted

      Our customers' safety isn't something we take lightly. To ensure you get the proper assistance for your truck's repairs, please fill out the form at https://s.chevy.com/support-request with all pertinent details including your username.
    • GMCustomerService
      2026 Z71 Forward and Rear Park Assist help

      By GMCustomerService · Posted

      We appreciate you sharing your experience with your truck. To ensure we get you the proper assistance, please fill out the form at https://s.chevy.com/support-request with all pertinent details including your username.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...