2014+ Gas Mileage (MPG) Topic

Shahar · December 20, 2013

Daniel,
How do you get to that "average/ best" screen in the DIC?

Sent from my iPhone using Tapatalk

It's one of the pages in the info menu. If yours isn't there, try going to settings on the DIC to enable it.

right on Daniel! Just found it!! It's pretty cool that you can modify the info page

Sent from my iPhone using Tapatalk

nrbrandt · December 21, 2013

I get about 16-17mpg but I drive a lot of short trips mostly on gravel roads.

I should add that this has mostly been cold weather driving as well. When I got the truck it had 222 miles on it and the computer said it had averaged 23mpg. I hope that when it warms up again mileage will increase. Right now the computer says 18.x mpg over 1900 miles. When I calculate it manually though I get 16-17mpg.

j-ten-ner · December 21, 2013

I would recommend to do the math with the calculator and not to trust the DIC too much.

The DIC is a good reference and actually close enough but not soooo correct.

As for the V6 or V8...I drive a V8 just because I love the sound of the engine and the power even though I don't need it.

And because I'm German....lol.....we have only 4-bangers back there.....

so long

j-ten-ner

arkenzo · December 21, 2013

I get about 25mpg on highway with light load, about 19-20mpg city , mine has 3800 miles so far...should improve a little more I hope.

V6 are popular in my area..Socal

Edited December 21, 2013 by arkenzo

diannabill · December 21, 2013

My dealer here in Oregon had several V6s. In fact their showroom Silverado was a V6.

nrbrandt · December 21, 2013

I test drove the 5.3 and 4.3, couldn't notice much difference

I came from an '04 V6 that was really doggy.The dealer I ended up buying from had a V6 on their lot and is the bottom of a big big hill, so we test drove it up that and I was sold instantly. It had a lot more power than my previous truck and slightly better mileage. I've been real happy with it so far. Even did some light towing just to see how it did and it was fine.

losky79 · December 21, 2013

When my truck was bone stock I was averaging 19 city and 23 hwy. Keep in mind I drive like an old lady, so that helps with MPG. I do have the V6 and I am happy with it. I guess the only thing I have to get used to, is the sound of Direct Injection at idle. Is it me or do these new engines idle louder than normal?

finn5033 · December 24, 2013

Thanks for useful replies. I actually like what I'm hearing here. Please keep it coming, I would be very pleased if the new v6 could be what I'm looking for

BillWho · December 24, 2013

Driving in the rain yesterday at highway speeds plus some urban stop and go, my 5.3 Sierra crew cab with 3.42 and 18" wheels averaged 20.2 mpg. Not bad for only having 1400 miles on the engine.

It is econ happy at 65 to 71 mph. A sweet ride.

BillWho · December 25, 2013

Looking through the thread I noticed the MPG wasn't as high as I would have thought (getting 22-23 highway out of my 6.2 CC) why are the v6 models so close to that? That blows me away. Is it maybe just needing some kind of remap? Don't get me wrong, in the city my mpg tanks to 14 a lot of the time because I have been enjoying those stop and go accelerations, but I figure the 6 would be getting 25+ no problem.

I'm guessing the fuel mileage for the three motor combinations is fairly close together for highway driving because all three engines go to four cylinders as much as possible, thus they are close to equivalency when running on four cylinders in terms of amount of power produced to keep the truck at speed. As we all know, engines are big air pumps, the air to fuel mixture is optimally around, what, 15:1 (somebody help me here with the correct ratio), and the power produced by exploding that mix per cylinder explosion would thus seem to be a constant amount. Racing engines turn up the RPMs, thus developing more power strokes resulting in more power per second. The V-6 has fewer cylinders and would be expected to have lower parasitic drag than the V-8s and I'd love to hear someone tell us how much this extra valve train and cylinder/crank frictional drag affects highway mileage.

A whole lot of words to say that the engines when on V4 are generating the same amount of power and thus shoving the same amount of air and fuel mix into the engine. The differences are likely the two fewer cylinders parasitic losses and that, it seems, may not a big energy loss factor at highway speeds. When sitting in city traffic, the V-6 has a big advantage versus the V-8s as those V-8s have to keep feeding two extra cylinders with a air/fuel mix.

I'd like to know more about the fuel/air mix going richer when under an increasing load, like going up a hill, and leaning out when going down the hill. With today's air flow mass sensor, direct injection and computerization technology, you've got to figure there is a lot of that kind of action taking place in our 2014 version engines.

Merry Christmas to all!

Edited December 25, 2013 by BillWho

mike94silverado · December 25, 2013

Not too many people wanting to throw good money at a truck that will run like a slug and no one else will want when it comes time to sell it.

only half of that is really true. The new v6 is plenty fast enough. Heck, the old 4.3 in the right truck was fine. (my dad has a 2011 RC/SB 4.3 4x4 and it moves well) but you raise a good point about it being tough to sell because they are with the old school mentality of truck buyers that a v6 isn't "Enough"

ShotgunZ71 · December 25, 2013

Merry Christmas, Billwho!

Sent from my DROID RAZR HD

tenx82 · December 25, 2013

I'm a little disappointed in mine so far. It's only at 646 miles, so I realize it should go up some, but as of now my average is 15.2 MPG with about 70% city driving.

I'm sure this is also partly due to being a winter fuel mixture, and my daily commute is about 3 miles round-trip.

Aside from my current fuel mileage, I have absolutely no complaints about getting the V6. I don't tow and only haul light loads, so the extra $$ for the V8 isn't worth it for me. I've driven several of the previous generation GM trucks with 4.3, 4.8, and 5.3 motors, and my butt dyno can't tell a difference between the 4.3 V6 in my 2014 regular cab short bod and the 5.3 V8 in my dad's 2002 extended cab.

Edited December 25, 2013 by tenx82

diannabill · December 25, 2013

I'm a little disappointed in mine so far. It's only at 646 miles, so I realize it should go up some, but as of now my average is 15.2 MPG with about 70% city driving.

I'm sure this is also partly due to being a winter fuel mixture, and my daily commute is about 3 miles round-trip.

Aside from my current fuel mileage, I have absolutely no complaints about getting the V6. I don't tow and only haul light loads, so the extra $$ for the V8 isn't worth it for me. I've driven several of the previous generation GM trucks with 4.3, 4.8, and 5.3 motors, and my butt dyno can't tell a difference between the 4.3 V6 in my 2014 regular cab short bod and the 5.3 V8 in my dad's 2002 extended cab.

Seems to me you couldn't expect much better. The combination of only a 1.5 mile one-way commute, winter fuel, majority city....it seems you couldn't get much better no matter what you were driving. And I don't know if you're starting it up and letting it warm up every morning, but it seems that would also contribute to lower-than-expected mileage. I wouldn't be disappointed.

New2GMC · December 26, 2013

I'm guessing the fuel mileage for the three motor combinations is fairly close together for highway driving because all three engines go to four cylinders as much as possible, thus they are close to equivalency when running on four cylinders in terms of amount of power produced to keep the truck at speed. As we all know, engines are big air pumps, the air to fuel mixture is optimally around, what, 15:1 (somebody help me here with the correct ratio), and the power produced by exploding that mix per cylinder explosion would thus seem to be a constant amount. Racing engines turn up the RPMs, thus developing more power strokes resulting in more power per second. The V-6 has fewer cylinders and would be expected to have lower parasitic drag than the V-8s and I'd love to hear someone tell us how much this extra valve train and cylinder/crank frictional drag affects highway mileage.

A whole lot of words to say that the engines when on V4 are generating the same amount of power and thus shoving the same amount of air and fuel mix into the engine. The differences are likely the two fewer cylinders parasitic losses and that, it seems, may not a big energy loss factor at highway speeds. When sitting in city traffic, the V-6 has a big advantage versus the V-8s as those V-8s have to keep feeding two extra cylinders with a air/fuel mix.

I'd like to know more about the fuel/air mix going richer when under an increasing load, like going up a hill, and leaning out when going down the hill. With today's air flow mass sensor, direct injection and computerization technology, you've got to figure there is a lot of that kind of action taking place in our 2014 version engines.

Merry Christmas to all!

Merry Xmas Bill and everyone else too.

Someone really smart once told me that the way to gauge engine value is how much HP to fuel usage it makes. If the 4.3, 5.3 and the 6.2 all use 3 gallons a hour to produce 100hp you should get the same economy if all the engines push a equivalent truck. That's why I look for charts showing gals/ torque/hp. They aren't around or make such charts easy to find for some reason.