Jump to content

Anyone driving a gasser yet? Mileage?

jamin87ss

Recommended Posts

TXGREEK Senior Enthusiast

TXGREEK

Posted
Posted
My 2500 dmax will get 25 on flat ground with little or no wind, as long as I run 55-60 and don't have to kick it out of cruise very often.  Repeated it many many times on several 2 lane runs I do frequently. 
 
But it doesn't take much town/city driving to ensure that my tank averages are never that high.  Last few fills have been just over 20, which is slightly better than what it was giving last summer.  
 
 


My 16 4x4 Z71 LTZ DMax was getting the same BUT, OP asked about “Gasser 3/4 ton not diesel.


Sent from my iPhone using Tapatalk
  • Replies 30
  • Created
  • Last Reply
bullet225ho Enthusiast

bullet225ho

Posted
Posted

I'm in outside sales. I drive all over mid GA. 2 times a week I drive to Columbus (80 miles one way) which is 4 lanes divided with 65 speed limit.

 

 I drive 85% on interstate or 4 lane divided roads.  65-75 is my normal speed.

 

With my 5.3 I actually get better mileage on 2 lane country roads which I drive a bunch of those too.  55-65.

 

 

Cowpie Senior Enthusiast

Cowpie

Posted
Posted
20 hours ago, TXGREEK said:


Highly doubt anyone will get that average in the new 3/4 unless strictly highway


Sent from my iPhone using Tapatalk

No. They probably won't.  But given the technology of the new L8T, they should be able to overall average a little better than the 6.0 L96 if they don't try to hot rod around.

Cowpie Senior Enthusiast

Cowpie

Posted
Posted
6 hours ago, redwngr said:

My 2500 dmax will get 25 on flat ground with little or no wind, as long as I run 55-60 and don't have to kick it out of cruise very often.  Repeated it many many times on several 2 lane runs I do frequently. 

 

But it doesn't take much town/city driving to ensure that my tank averages are never that high.  Last few fills have been just over 20, which is slightly better than what it was giving last summer.  

 

 

Compare that to my 6.0 on E85.  While my MPG is substantially less than what one gets with a Dmax, it doesn't cost me anymore per mile for fuel.  I average about 12 for all miles on E85.   Have gotten 14 mpg average highway on road trips on E85.  At the price of E85 near me at $1.89 and diesel near me at $2.98, based on the overall average mpg on E85, my cost per mile is about 15.75 cents a mile.  For a Dmax to average 15.75 cents a mile for all miles at current cost for diesel, it would have to average for all miles roughly 19 mpg for all miles.... city, highway, hauling, etc.

 

So using E85 in my 6.0 is essentially a wash on fuel cost per mile.  One of the reasons I do not consider the Dmax.  I am not trying to move a mobile home and really don't need a Dmax and having one is just too much cost and headache with no appreciable gain.  Now, if I was really towing heavy on a frequent basis, then it could be viable.  For my work around the property in my rural neck of the woods, not so much.

CRApex Enthusiast

CRApex

Posted
Posted
32 minutes ago, Cowpie said:

Compare that to my 6.0 on E85.  While my MPG is substantially less than what one gets with a Dmax, it doesn't cost me anymore per mile for fuel.  I average about 12 for all miles on E85.   Have gotten 14 mpg average highway on road trips on E85.  At the price of E85 near me at $1.89 and diesel near me at $2.98, based on the overall average mpg on E85, my cost per mile is about 15.75 cents a mile.  For a Dmax to average 15.75 cents a mile for all miles at current cost for diesel, it would have to average for all miles roughly 19 mpg for all miles.... city, highway, hauling, etc.

 

So using E85 in my 6.0 is essentially a wash on fuel cost per mile.  One of the reasons I do not consider the Dmax.  I am not trying to move a mobile home and really don't need a Dmax and having one is just too much cost and headache with no appreciable gain.  Now, if I was really towing heavy on a frequent basis, then it could be viable.  For my work around the property in my rural neck of the woods, not so much.

Let’s not  turn his 6.6 gasser fuel mileage question into another gas vs. diesel discussion.   Not many minds will be changed by either sides point of view...and there are many different ways to look at it.  Besides, everyone knows the Dmax drives better towing or not, worth the extra fuel cost.. :)

KARNUT Senior Enthusiast

KARNUT

Posted
Posted

Most people know driving around in a 3/4 ton is a waste compared to a 1/2 ton for efficiency. So is driving a truck versus a car or mini van. That’s not why people do it. The real question would be. What’s the difference in fuel mileage pulling my equipment around between like equipped trucks. Maybe asking the question means you’re not charging enough for your work. Or you can’t afford the camper you’re pulling. The only reasons I would own a 3/4 ton.[emoji41]


Sent from my iPhone using Tapatalk

ApertureX Enthusiast

ApertureX

Posted
Posted
1 hour ago, KARNUT said:

Most people know driving around in a 3/4 ton is a waste compared to a 1/2 ton for efficiency. So is driving a truck versus a car or mini van. That’s not why people do it. The real question would be. What’s the difference in fuel mileage pulling my equipment around between like equipped trucks. Maybe asking the question means you’re not charging enough for your work. Or you can’t afford the camper you’re pulling. The only reasons I would own a 3/4 ton.emoji41.png


Sent from my iPhone using Tapatalk

Or, he's like me. I'm buying the 3500HD to pull a 5th wheel RV with a 3000lbs pin weight once to twice per month now that the kids have moved out, but it will be primarily my daily driver in metro Atlanta for my job. When not having the option to have a separate truck for pulling and a separate car for commuting, yes the fuel milage question is valid and has nothing to do with what one can afford or not. It has more to do with figuring out how often I will have to fill up the tank compared to what I drive now.

 

Let's remember that everyone's needs and situations are different and try to answer the question asked instead of trying to guess the motivation for the question.

KARNUT Senior Enthusiast

KARNUT

Posted
Posted
Or, he's like me. I'm buying the 3500HD to pull a 5th wheel RV with a 3000lbs pin weight once to twice per month now that the kids have moved out, but it will be primarily my daily driver in metro Atlanta for my job. When not having the option to have a separate truck for pulling and a separate car for commuting, yes the fuel milage question is valid and has nothing to do with what one can afford or not. It has more to do with figuring out how often I will have to fill up the tank compared to what I drive now.
 
Let's remember that everyone's needs and situations are different and try to answer the question asked instead of trying to guess the motivation for the question.

Atlanta daily, you poor soul. You’ll save money buying a used car. Been there done that. Or vice versa.


Sent from my iPhone using Tapatalk
Cowpie Senior Enthusiast

Cowpie

Posted
Posted

I think that the folks at GM kept their main consumers of the HD pickups in mind (commercial users) regarding the 6.6  L8T by offering a beefed up version of the 6L90 instead of going to the 10 speed.  Much along the same line that, unlike the 6.2 Ecotec, they made sure that the 6.6 would develop full power using regular instead of premium fuel.  They did miss the mark though in not having Flex Fuel capability as there are many fleets, state and municipal buyers, and individual users that want that diversity in their engine. Especially since GM has a big market share in many of the ethanol producing states.    

 

Sometimes it is best to not introduce too much new stuff into the product line without first proving its reliability. If it doesn't play out well, then one risks ticking off the main buyers of the HD pickups.  And unlike general consumers who generally have short memories and have no problem switching back and forth on a whim, commercial buyers can be real tough to get back on the reservation if they lose confidence in a OEM.  Witness International Trucks and its Maxxforce engine design.  

L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

My dealer just got one, man do they ever make the 2019+ half tons look ugly. It's a WT here with the goofy wheels and grille and I am telling you, it is a beautiful truck. Any 6.6L Gas driver's, how does it feel power wise compared to the outgoing 6.0L? I think I might have to hand my 2018 down to the guys and get the boss a new truck. I know there is a numerical HP jump, but they also put higher ratio FD. Now 3.73 vs the old 4.10. I would expect that switch would take away any felt power increases. 

  • 4 weeks later...
Demig7o7d7 New Member

Demig7o7d7

Posted
Posted

If you drive 55 mph you will average 18.9 mpg in the gasoline 2020 Silverado HD 4x4 custom. I’ve been breaking mine in at that speed on the highway. In town, 11mpg.  Once I get over the 500 mile break in, I am expecting 15 mpg average at speeds of 75mph. We will see. I can’t drive 55, unless i’m in Colorado. Lol. Maybe I will learn to!

I will probably end up chipping the tough 6.6 gas engine to get the real Chevy  power..

I traded my $55000.00 6” lifted 2017 Tuscany Silverado Baja 1500 with 35” tires for $36000.00. Only 11000 miles on that one. Someone in Dallas got a beaut for cheap. I lost 20000 US when I bought the HD. That’s enough to feel sorry for myself. Can’t fix stupid! 

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

I am one of those weird ones.  I spent all those years from '74 thru '87 with a national speed limit of 55 mph.  I usually drove around 60 during those times.  When things went up to 65, that is where I settled in.  Whether it is my wife's car, my pickup, or my semi truck, I typically don't run over 65 anywhere.  Just an occasional kicking it up a little when passing of the freeway so I am not hanging out in the left lane and hindering others.  But after I pass and get back in the right lane I go back to 65.    Probably why i generally get better than average fuel economy from my vehicles.  Guess I never got the "need for speed" bug.    What helps with the fuel economy by doing 65 probably is more associated with the fact that I am not at the whim of those frequent accordion traffic situations where everyone is moving in herds like cattle and speeding and slowing down all the time.  I am able to keep a more constant speed longer.

 

My 2015 2500 6.0, when I was running regular gas in it, would average 14 mpg for all miles and 17-18 mpg highway miles.  I would expect that the 6.6, under the same conditions, should get a little better than that.  Under similar conditions, whether a 6.0 or 6.6, the amount of power needed to move the vehicle is the same.  Given the improved design of the L8T over the L96, that should mean better fuel economy from the L8T.  But I have expected better results from GM in the past and was disappointed.  

redwngr Senior Enthusiast

redwngr

Posted
Posted
On 9/22/2019 at 9:15 PM, Demig7o7d7 said:

If you drive 55 mph you will average 18.9 mpg in the gasoline 2020 Silverado HD 4x4 custom. I’ve been breaking mine in at that speed on the highway. In town, 11mpg.  Once I get over the 500 mile break in, I am expecting 15 mpg average at speeds of 75mph. We will see. I can’t drive 55, unless i’m in Colorado. Lol. Maybe I will learn to!

I will probably end up chipping the tough 6.6 gas engine to get the real Chevy  power..

I traded my $55000.00 6” lifted 2017 Tuscany Silverado Baja 1500 with 35” tires for $36000.00. Only 11000 miles on that one. Someone in Dallas got a beaut for cheap. I lost 20000 US when I bought the HD. That’s enough to feel sorry for myself. Can’t fix stupid! 

18.9 at 55 makes me glad my '18 is a duramax.

 

530 miles today.  24.1 mpg indicated.

 

Ya, I know, mpg indicator is often optimistic.  But for sure more well over 19.

Mixture or 57-62 mph with about 25% 68-74mph. 

 

 

Recently did a Port Huron to Denver run, and some mountain side trips (Pikes and RMNP/Trail Ridge Road). Every tank was over 20 hand calc.  Both ways were way over 70 mph most of the time. 

Not lifted. Tires aired down to the 55-57 range cold. 

 

Sure is nice being able to fill and home (about 50 miles into Canada) and then only once between home and Denver.

 

 

Archived

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

Go to topic listing

  • Latest Articles

  • Posts

    • mysery1
      What have you done to your K2 today?

      By mysery1 · Posted

      I have a 2018 Silverado Custom with 156k on the odometer. In the last month I've replaced the plugs, wires and the driver side engine mount. My wife just returned from a trip of about 1500 miles and told me the brakes are making a grinding noise when applied. I drove it and looked it over and this is what I found with the driver's side rear rotor.   I'm going to order new pads and check about having the rotor resurfaced. Hopefully this is easier than the last 2 jobs.   Peace  
    • FiLo
      5.3 / 6.2 valve covers / oil burning

      By FiLo · Posted

      Any update if the new valve cover help with the oil consumption?  I have a 2014 GMC sierra and my truck is consuming a lot of oil so I’m wondering if replacing the driver side valve cover will stop some of the oil consumption. Thanks 
    • 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.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...