2014+ Gas Mileage (MPG) Topic

[brannnor]

I want one that gets 22 mpg I havnt got close yet 19.1 is best so far

 

2014 GMC 1500 4dr 5.3

[Texas Sandman]

Averaging around 20 in town back and forth to work. Best 50 mile average was 24.8 so far. Can't wait until she gets broke in.

[Mike1220]

Wow....thanks ...hope mine breaks in too....

 

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How many miles you got on the truck?

 

 

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[dodgehemi0]

You can't just blame driving style. I had a 5.3 with 3.08 gears and my lifetime over 9000 miles was 14mpg. I would drive with the full intention of getting the best fuel economy possible, but it just wouldn't do it. It did have some good moments here and there, but when I went to a diesel 2500 I broke all my mpg records from that 1500.

 

It's a shitty problem to have because the dealers won't help out because it's easy to blame driving style.

 

 

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i agree that is shitty. No way you can prove it to them that I know

 

 

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[fondupot]

Copying my post from another thread, for FYI here guysl:

 

Been emailing back and forth with Blackbear tuning about getting a tune done. They recommend running at lease 89 octane in the 5.3. See the quote below from my email with Justin at Blackbear. I will be more than likely using 89 octane from now on with the tune. I probably wont use E85 anymore because of the crappy mileage and its overpriced by me. Paid 3.72 for E85 last weekend, and 3.55 the weekend before that! Meanwhile since then regular gas has dropped below 3.70! The combination of an 89 octane and a tune from Blackbear, I'm sure I will see similar performance gains like when using E85 but with the gas mileage of regular gas.

 

Quote

 

The 5.3L does not *require* higher than 87, but it cannot burn 87 efficiently, ever. We've encountered thousands of them (2007+) and they all, every single one, ping on 87 octane due to the high compression ratio. The 2014s are slightly better than the previous model due to the direct injection, but are still not happy on 87. As a result, 89 octane will almost always pay for itself and will definitely be more consistent and more responsive. 91+ octane is not a necessity, especially not with factory tuning, but 89 octane is a win-win.

[Newm]

^ Man I want a Blackbear tune soooo bad. Just haven't mustered up the courage yet. Ha

 

 

 

Just filled up again,

430 miles

23.1 gallons

18.61 MPG

I had more than a few "foot to the floor" runs on this tank as well messing with my buddies Tundra.

[fondupot]

^ Man I want a Blackbear tune soooo bad. Just haven't mustered up the courage yet. Ha

 

 

 

Just filled up again,

430 miles

23.1 gallons

18.61 MPG

I had more than a few "foot to the floor" runs on this tank as well messing with my buddies Tundra.

 

 

Thats pretty good mileage. My numbers on regular gas are usually betteen 17-18 around town. With E85 I've been averaging between 14-15 around town. But dat powaaa

[PickUPS]

are you the first one to take off from a red light? If so that's why the mileage is so bad.

I'm always the first one off the line at red-lights and I get great mileage. For me it is sort of a game, both high mileage and not being left by traffic at a light.

 

I accelerate fairly slowly so it seems even worse to my fellow drivers if I'm caught napping at a light.

 

Two feet on the two pedals helps a lot. I am ready to go as soon as the light changes. I brake with my left always anyhow.

 

I use enough power to make sure I get up to a higher gear in a short time span. The grade/incline of the road makes a big difference in what gear/speed I seek to reach. I accelerate smoothly but often more slowly than other vehicles. When I reach my target gear/speed I transition to maintaining that speed. This is usually a calculated choice to lift my right foot just enough to stop all further acceleration.

 

I always tried to save fuel in my 2004 Silverado. It was frustrating and required ridiculous effort for small gains. These new DI trucks are well suited to stretching the fuel.

[leviblue]

Best mileage is 25.4 and average 16-18 city. I don't drive like its a Sunday afternoon and like to open it up on the highway. No mods, still stock and lovin' every minute.

[Mark L]

Hello everyone,

 

Just got back from a trip to San Diego, put about 1000 miles on my Sierra Denali with the 6.2L

 

Please keep in mind I live in Commifornia and we have the strictest emissions in probably the world.

 

Please also keep in mind I was 1 of 4 people in the truck with an estimated payload of 1,000-1,200 lbs (4 bodies plus various suitcases, laptops, coolers, etc)

 

Also, this trip occurred in 100* central valley heat for 62% of the miles

 

Truck is 2WD with Standard Box

 

Used 91 octane entire trip

 

Here are my real world MPGs with my 6.2L (truck is basically brand new, picked up in 2nd week of April, this was first road trip):

 

To San Diego:

 

 

From San Diego:

 

 

 

I was extremely pleased with the 6.2L getting over 20 MPGs on a trip like this. When you account for the CA emissions restrictions on my truck, the valley heat, the payload, the L.A. traffic and the Grapevine (mountain range separating NorCal and SoCal)..... to get 20.8 MPGs on my return trip is outstanding IMO.

 

I kept the cruise control on 73 MPH on pretty much the entire trip (when I wasn't in traffic).

 

 

So count me as very impressed with these new engines from GM. I NEVER came close to these MPGs in my old 2010 GMC Sierra CCSB with the 5.3L

Edited July 7, 2014 by Mark L

[bass mechanic]

Sounds pretty consistent with my results, in colorado I think we get a little better mpg. And I think my bedcover also gives me about .5-1 mpg.

I also know my dirt bike in the back will cost 1-2 mpg on the highway and once I accident my had the truck in 4wd auto which cost me about 1 mpg on a tank

 

 

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[Tattooo]

 

My milage is getting better.....also I noticed when I drive 80+ I get great milage 20+ mpg...65 - 79 mph im getting 17.5 average mpg

[Aaron1085]

Cruised 115 miles the other day between 80/85mph. Avg 19mpg...Not too shabby.

**with 93 Octane**

Edited July 7, 2014 by Aaron1085

[Dj0nes]

Cross country trip from Ohio to Arizona crew cab short bed 5.3 w/ 22" wheels 3.42 gears with around 4-500 pounds in the bed averaged 70-80 mph the whole trip. 87 octane the whole way.

 

 

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Edited July 7, 2014 by Dj0nes

[Tattooo]

Not bad !

 

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