Post your MPG on Taller Tires

[BlackZ71Silverado]

LOL...... that's not a "big boy" truck. When that is mentioned people think of a 3500HD duelly with a DuraMax, not a 2500 with a 6L gas engine. Nothing big about it really.

 

 

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[Chads09Sierra]

2009

5.3

305/55/20

13.3 mpg in town 90%

Black bear tuned

[hockeypro1411]

LOL...... that's not a "big boy" truck. When that is mentioned people think of a 3500HD duelly with a DuraMax, not a 2500 with a 6L gas engine. Nothing big about it really.

 

 

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"LOL"...... bigger than either and both of your trucks, genius. I think "big" was refering to potential lift and tire combos, not 3500HD duelly diesels. Go play with your half-tons somewhere else..

[Black2011]

Now now girls play nice.

 

2011 1500 4wd.

3.42's

4.8l 4 speed (4l60 I believe)

 

265/70/R17 Avg 13 city, 19 highway @75mph

285/70/R17 Avg 10 city 13.5 highway @70mph

 

with 285's, the 4.8 is a dog!

[STINSAN3]

2007

5.3

460LE

305/50/20

3.73

15-17 mpg

[BlackZ71Silverado]

hockeypro1411,

I didn't mean to hurt your feelings, just expressing opinion that's all. When I hear big truck it's either like I described above or lifted 6" or above.

 

Now now girls play nice.

 

2011 1500 4wd.

3.42's

4.8l 4 speed (4l60 I believe)

 

265/70/R17 Avg 13 city, 19 highway @75mph

285/70/R17 Avg 10 city 13.5 highway @70mph

 

with 285's, the 4.8 is a dog!

 

 

A tune would definately fix that "dog" issue you are having because of those tires and probably increase your MPG's in the process.

[hockeypro1411]

hockeypro1411,

I didn't mean to hurt your feelings, just expressing opinion that's all. When I hear big truck it's either like I described above or lifted 6" or above.

 

Now now girls play nice.

 

2011 1500 4wd.

3.42's

4.8l 4 speed (4l60 I believe)

 

265/70/R17 Avg 13 city, 19 highway @75mph

285/70/R17 Avg 10 city 13.5 highway @70mph

 

with 285's, the 4.8 is a dog!

 

 

A tune would definately fix that "dog" issue you are having because of those tires and probably increase your MPG's in the process.

 

 

My truck is lifted 6 inches... Keep diggin'!

[8.1HD/ALLISON]

Now now girls play nice.

 

2011 1500 4wd.

3.42's

4.8l 4 speed (4l60 I believe)

 

265/70/R17 Avg 13 city, 19 highway @75mph

285/70/R17 Avg 10 city 13.5 highway @70mph

 

with 285's, the 4.8 is a dog!

 

Did you correct speedo when switching to bigger tires? Thats a big loss.

[formerlylifted]

2008

 

4.8L

 

4L60E

 

295/70/17

 

3.42

 

10mpg @ 70-75mph

 

mostly highway

 

No speedo fix but track speed with garmin

 

btw I agree- the 4.8 is a dog

[Black GMC]

2011

5.3L

4X4

3.42

6 speed tranny

285/70/17 ( 2 sizes bigger than stock or 32.9)

Air Raid Cold Air intake

 

17.8 MPG All in town.

What I have figured out that if I stay exactly at 40MPH on my way to work my truck will go into 4 cylinder mode and sit at 1000RPM.

I am very happy with the mileage. I didnt have the speedo corrected for the dealer wanted $100 so I dont think its off that much.

[tyhuck]

Dont stop now. We need some more of you guys with 35s and 37s to put up some numbers.

 

I know MPG isnt something you guys typically worry about, but it never hurts to calculate.

[MisterC190]

2010 Silverado Z71 LTZ

5.3l v8

6 Speed

Dynatech Supermaxx Headers

Airraid Cold Air

Magnaflow muffler

4.10 gears

35" Toyo MT's

Nelson Tuned

 

Since the tune and headers I've been driving a little fast.. Can't help it.. But these are my numbers as of now.

 

Average 12mpg

14mpg at 70mph

17-19mpg at 55mph

[tyhuck]

On your truck with the 6spd, would the 4.10s be more comparable to a 4.88 or a 5.13 with the 4spd?

[govener71]

1999, (216,000 miles)

5.3

4l60e

3.73 4 speed

285/75/16

 

50% highway 50% city

16 mpg

 

100% highway

18 mpg

[358429]

Year: 2008 1500

Engine: 5.3L

Transmission: 460LE

Tire Size: 275/70/18 (GY Wrangler Silent Armor Pro Grade, E-rated)

Gear ratio: 3.73

MPG: Fluctuates around 15mpg - mostly commuting in suburban areas with occasional trips to jobsites in downtown DC. Highway mileage - 18-19mpg depending on speed and terrain.

I lost roughly 1/2 - 1 mpg when I changed from the factory 265/65/18 tire.

Mods - listed in sig