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01-11-2014, 09:32 PM #1
- Join Date
- Jul 2012
- Calgary, AB, Canada
gas mileage, what do you guys get?
I HATE when people talk about gas mileage on the jeep forums I visit, but i'm going to post one too. my 13' Sierra is getting 15.2 L/100 km. about 16 mpg. I drive mostly highway. do you guys get similar numbers? i'm not complaining. but I thought with the 6 speed tranny i'd get better than the old 4 speed, and its not. 5.3l motor. no mods, stock tires. yes I drive to fast. 120km/h (75 mph?) the sticker/factory numbers were a lot better though.05' GMC Sierra 1500 quad cab 5.3L Daily Driver and tow rig
01-12-2014, 06:37 AM #2
Its hard to match the factory numbers, those are under specific driving conditions which dont match real world driving, I was at 17.9 with the 5.3 4x4 z71 6 SPEED, I am at 19.1 after adding the AFM kill , K&N and nitro to my tires, beats me but thats the real numbers, I am 65 to 70 mph more than not. 19.1 is up from a starting point of 17.9, it seems like the little things you do make up several slight improvments, basic of 1.2 increase If you factor 200 bucks for the AFM device, 225 for K&N, and 50 bucks for nitro fill, im about 500 bucks for a 1.2 MPG increase, ( K&N and nitro is something I do on all my vehicles, it wasnt to improve, it just does somehow). I am happy as a freed canary at 19.1 MPG. I know some guys here post great numbers, and some not so great, I bet you get some good advice on this from others in here, good luck.Life is short compared to history
01-12-2014, 10:08 AM #3
summitwhite11 has mentioned above.....Its hard to match the factory numbers.....when your driving at (75 mph?) While each Vehicle Reaches its Optimal Fuel Economy at a Different Speed (or Range of Speeds), Gas Mileage Usually Decreases Rapidly at Speeds Above 50 mph, and but After 60 mph it Generally Declines Quite Significantly, and from 50 to 60 mph Fuel Economy Drops by 12%, from 50 to 70 mph it Drops by 25%, and from 50 to 80 mph it Falls by 36%.
I would also mention that another reason for your Drop in Fuel Mileage, is Winter Blend Gasoline.....
5.3 l 3.73 l G80
BLACK BEAR CUSTOM TUNE
SNUGTOP l COLORMATCH l KATZKIN
01-12-2014, 12:25 PM #4
01-12-2014, 01:58 PM #5
- Join Date
- Jan 2009
- Norwalk, Ohio
- Blog Entries
Gas mileage right now for me is
05 2500hd 6.0-12mpg
13 camaro 2ls 24.52004 Chevy Colorado
LS1 5.7 swap/TBSS rear axle swap
01-13-2014, 10:24 PM #6
- Join Date
- Sep 2013
I get about 14mpg, I have 285/75/16's, 5.3, 4l60e, 3.73 gears, and dual exhaust.
01-13-2014, 10:34 PM #7
Really? I heard the 'sweet spot' for most vehicles was around 55 mph for optimal fuel economy.
(With 3.42 gear ratio, 4L60-E Automatic, P245/75R16 tires)
In summers, I get 14 driving around town, 18 or 19 on highway. Winter I get 11 or 12, maybe 15 highway.Dallas Rourke Smith
1993 Chevrolet K1500
- Regular Cab, Long bed - 5.7L 350CI Small Block V8 - 3.42 Gear Ratio - Built at Fort Wayne Assembly Plant, Indiana
01-14-2014, 09:56 AM #8
with highway speeds @75MPH you will get lower MPG. My 2000 4X4 5.3L ext cab gets 18-19 MPG @70MPH max speed on the high way trips in summer. when the cold weather comes this drops down to 17MPG. cold temps and high speed will drop the MPG.
when driving do not hit the throttle down fast , as this will greatly reduce MPG. Change speeds slowly.
01-14-2014, 03:22 PM #9
On my 2013, 5.3L, 4x4, I get about
17.5 avg city driving on M5., AFM OFF
18.5 avg city on D, AFM ON
19-20 avg high way at 75mph
16-17 avg city
18-19 avg high way at 75mph2011 Chevy Silverado LT 4WD 25k miles
2001 Suburban 2WD, 5.3, V8 176k miles
01-14-2014, 03:54 PM #10
- Join Date
- Nov 2013
My '96 7.4 has gotten as high as 12mpg straight highway to as low as 8.6 in the city.I like all dogs I meet, and some people too.
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