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Fuel Mileage

Toxicgoober

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Toxicgoober Enthusiast

Toxicgoober

Posted
Posted

Ran about 140 miles, 95% interstate, at about 70-80 mph most of the way and got a little over 20 mpg out of the 5.3. I'm pleasantly surprised. I'm coming from 2 Tundras (12' and 14') that average maybe 16-17 mpg with the 5.7. If I had gone slower V4 would've kicked in more often and I could've gotten more like 23 mpg. I know this topic has been discussed many times; just thought it was interesting considering this was at "real" hwy speeds and not some slow fuel saver run. Pretty impressive considering the power output in reserve if you need/want it. Sorry if this is in the wrong location; feel free to move it.

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tnchevy Senior Enthusiast

tnchevy

Posted
Posted

You will need to deduct 1 mpg off what the computer shows but still great gas mileage.

NoProblem Enthusiast

NoProblem

Posted
Posted

I've got almost 30,000 mostly highway miles on my 2014/5.3/3.08 and have averaged almost 18mpg when I run regular gas and about 14mpg when I run E85.

 

Winter time I only avg about 15 - 16mpg on regular gas. The only thing I did to the truck is a level and a tonneau cover.

 

Kudos to those folks who get 20 - 25mpg out of their full size trucks!

 

 

 

Boardmember Senior Enthusiast

Boardmember

Posted
Posted

My '11 Tundra wouldn't hit 20mpg if I popped it in neutral rolling downhill...

 

I agree that the computer readout is a little optimistic. I manually calculate every full up but it's generally not quite 1full mpg less.

Andy Seibel Enthusiast

Andy Seibel

Posted
Posted

I manually calculate every full up but it's generally not quite 1full mpg less.

 

yup. I just updated my fuel spreadsheet with 1 year worth of receipts in my 5.3. I wrote down the "computer calculated mileage" on every receipt. Most of them average about .5 mpg more optimistic than the real calculated mileage. it does range from 1 mpg off to almost no error. But over one year of use, I believe it averages only about .5 mpg off of what the truck calculates.

 

On a side note, last weekend I matched my personal best 50 mile mgp. I hit 25.1 at 70 mph with cruise on. There was no wind at all so that helped. My highway average for driving to the in-laws in the state to my West is usually around 20-22 depending on weather conditions.

 

I have a pretty much stock truck with tonneau cover.

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redwngr Senior Enthusiast

redwngr

Posted
Posted

I'm disappointed when my tank average is less than 20.

 

(unless I'm towing)

WilliamBos Senior Enthusiast

WilliamBos

Posted
Posted

yup. I just updated my fuel spreadsheet with 1 year worth of receipts in my 5.3. I wrote down the "computer calculated mileage" on every receipt. Most of them average about .5 mpg more optimistic than the real calculated mileage. it does range from 1 mpg off to almost no error. But over one year of use, I believe it averages only about .5 mpg off of what the truck calculates.

 

On a side note, last weekend I matched my personal best 50 mile mgp. I hit 25.1 at 70 mph with cruise on. There was no wind at all so that helped. My highway average for driving to the in-laws in the state to my West is usually around 20-22 depending on weather conditions.

 

I have a pretty much stock truck with tonneau cover.

What gearing does that have? 8 speed or 6 speed? That's awesome!
Andy Seibel Enthusiast

Andy Seibel

Posted
Posted

What gearing does that have? 8 speed or 6 speed? That's awesome!

Mine is the 3.42 6-speed.

 

Keep in mind those numbers are all highway. My average tank is generally around 19 mpg.

WilliamBos Senior Enthusiast

WilliamBos

Posted
Posted

Mine is the 3.42 6-speed.

 

Keep in mind those numbers are all highway. My average tank is generally around 19 mpg.

That's awesome! Thank you.

UplandPa Enthusiast

UplandPa

Posted
Posted

A lot of people have stopped comparing the Tundra to these trucks simply because there is no comparison! These trucks a just better hands down!

Fish Slayer New Member

Fish Slayer

Posted
Posted

I picked up my 2015 Silverado 5.3 liter a couple of weeks ago. Technically it's a used vehicle but it only had 3,600 miles on it. Today I drove down to Portland from Seattle. I got 25.3 mpg, but given the comments here, it's likely to be a little bit less. Granted, I had it on cruise control the whole way and didn't go much past 60mph. Still, I'm VERY happy with the results.

 

 

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Crstfr Enthusiast

Crstfr

Posted
Posted

2k miles on the truck... but its a daily.. to work and back.. about 26 miles one way.. then to the ranch every other weekend.. 56 miles one way.. .. i'm averaging about 16.8 daily driving....which to me is awesome... my last ford v8 5.3 i was only getting about 10-11 ..grrr..

truckguy82 Senior Enthusiast

truckguy82

Posted
Posted

2014 all terrain 6.2L, completely stock. First time I ever just completely chilled for 20 minutes of driving. Trip was 30 miles, Cruise at 65mph.

 

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kp52 Enthusiast

kp52

Posted
Posted

Over 6000 miles of 50/50 hwy city I an at 19.2mpg average, thats a tiny bit high compared to actual when I check it. To compare my last '13 Ram hemi/3.92 gear ram over the same amount of mileage and exact same driving route was at 15.6mpg and that was little high compared to hand calculated as well.

 

The new GM trucks certainly gets some impressive gas mileage.

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