MPG w/level and 33's

JONBLARC7 · February 4, 2020

Same here with 33" 22x12 2.5 leveling kit and 1.5 body lift. At 60 to 65 I can get around 18-19 mpg if there is no stop and go. At 75 to 80 it's more like 15 to 16 mpg

Snowcamo · February 4, 2020

Hey guys, let's add a little more clarity to the thread for others who view this in the future. . Engine size, 4x4 or 2wd, the amount of level/ lift, tire type: all terrain, Highway Tire, mud tire, and year. It'd be cool to see how much of a variance there is. Cheers

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Rick Burnham · February 4, 2020

11 hours ago, 2018GMC said:

I have bilstein 5100 on 3rd notch for 1.75" lift. Nearly 33" (32.8") BFG K02 Tires.

I can still pull down 20 - 22 if I drive 65 -68.

If i went your speed i'd prob get the same mpg as you.

On a 50 mile 2 lane road with cruise set at 58, I averaged 28 mpg.

As others have said speed kills mpg when you're driving a brick with the frontal area of a sheet of plywood.

good info...thanks. Yeah it just is what it is when making that sort of time.

Edited February 4, 2020 by Rick Burnham

JONBLARC7 · February 4, 2020

To add to mine above I'm in a 2014 6.2, 6L80e trans. 3.42 rear with a cam and heads on 93. Put in E85 and it would be down 3-4 mpg.

Edited February 4, 2020 by JONBLARC7

aseibel · February 4, 2020

13 hours ago, CamGTP said:

88mph would last only a few minutes here, then it would be zero while you're pulled over lol.

no kidding. Texas is a different world.

We don't have any roads with a limit over 70.

rbrjr1 · February 4, 2020

GA has large stretches of most interstates at 70mph, the GeorgiaStatePatrol allow an unspoken 10mph over the limit speed. (i've even passed them going 80/70 while they were closer to 70 without incident).

in August 2019, when I first got my 2018 5.3L Z71 crew cab, I got 25.5mpg on the highway (stock configuration).

I drove up through the Appalachian mountains last week and averaged 21-22mpg (10mph over posted limits) after a 2" urethane level kit. (still stock wheels/tires).

NWdirt · February 4, 2020

With my 2014 6.2L LTZ DC 4wd. I lost about 2.5 mpg when added RC 3.5" level kit and 33x12.5 r20 Toyo RT with 20x10 wheels. At 65 mph was 20 mpg on average to now 17.5 mpg.

TXGREEK · February 5, 2020

2018 GMC CC SLT Tuned 6.2 w323 Rear End Z71 4X4 Standard Bed, 4.5” CST Lift, 20X9 Fuel Wheels on 33”KO2’s

65 MPH gets average 23 mpg w Super

65 MPH Super mixed with E85 average 20 mpg

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Snowcamo · February 5, 2020

2018 GMC CC SLT Tuned 6.2 w323 Rear End Z71 4X4 Standard Bed, 4.5” CST Lift, 20X9 Fuel Wheels on 33”KO2’s

65 MPH gets average 23 mph w Super

65 MPH Super mixed with E85 average 20 mpg

Sent from Above

Did you re-gear?

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TXGREEK · February 5, 2020

Did you re-gear?

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Nope, stock 323’s

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Snowcamo · February 5, 2020

Nope, stock 323’s

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Right on[emoji106]

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matt_009 · February 11, 2020

I can get up to 19 mpg (truck calculated) if I set the cruise around 70. Speedometer is 3-4 mph off in the 70 mph range because I haven't done a tune. On my daily 25 mile commute, with *several* hard accelerations and cruising 75-80 I usually get about 17-17.5 mpg(Again, Truck Calculated).

I also haven't bothered to calculate milage by hand because I haven't driven on a long trip in a while to measure gps distance between gas stations.

34" x 11" ko2 tires (measures about 33" tall when mounted on the truck) 2.25" Procomp lift.

6.2L, 8 speed transmission, 3.23 gears, magna flow 3.5" muffler welded in place of stock muffler and flapper , drop in air filter, 93 octane

Edited February 11, 2020 by matt_009

matt_009 · February 12, 2020

17.2 mpg driving in rush hour traffic on the way to work. 19 on the way home keeping the cruise control set. Probably about 12 miles interstate and 10 miles on back roads

Edited February 12, 2020 by matt_009