Lifted duramax fuel mileage

ullose272 · August 3, 2020

For those of you that lifted your 3.0 duramax, how much did it hurt your fuel mileage? Please include lift and tire size

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Pyroman_28 · August 6, 2020

I have a GMC Sierra Crew-Cab X31 3.0 Duramax with a 6" lift in the front and 7" in the rear and 35" mud tires on 22" wheels. I'm getting 20-22mpg at 60mph, about 16-18mpg at 70mph and 14-16 at 80mph. Hope that helps!

Edited August 6, 2020 by Pyroman_28

Keinsi · August 7, 2020

2020 Silverado LT Duramax with Off-Road Diesel Package, 2 inch GM Trail Boss lift, and stock Trail Boss 18" wheels/tires: 23mpg combined.

ullose272 · August 7, 2020

I have a GMC Sierra Crew-Cab X31 3.0 Duramax with a 6" lift in the front and 7" in the rear and 35" mud tires on 22" wheels. I'm getting 20-22mpg at 60mph, about 16-18mpg at 70mph and 14-16 at 80mph. Hope that helps!

Any idea what the wheels and tires weigh?

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Pyroman_28 · August 7, 2020

11 minutes ago, ullose272 said:

Any idea what the wheels and tires weigh?

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Yeah, they are about 125lbs each, so about 500lbs for the whole set mounted and balanced. My tires are also F load rated with a 12 ply sidewall so they are about as heavy as you can make them.

ullose272 · August 7, 2020

Yeah, they are about 125lbs each, so about 500lbs for the whole set mounted and balanced. My tires are also F load rated with a 12 ply sidewall so they are about as heavy as you can make them.

Damn thats heavy

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Pyroman_28 · August 7, 2020

Yea. For reference, I had 20" wheels with E rated 35's on my last two trucks (one set was actual chrome as well) and they weighed right around the same give or take 5 lbs so if you plan on running 35's on a bigger wheel I would expect whatever you get to be in that same ballpark.

Edited August 7, 2020 by Pyroman_28

BabyDmax · February 26, 2021

On 8/6/2020 at 1:05 PM, Pyroman_28 said:

I have a GMC Sierra Crew-Cab X31 3.0 Duramax with a 6" lift in the front and 7" in the rear and 35" mud tires on 22" wheels. I'm getting 20-22mpg at 60mph, about 16-18mpg at 70mph and 14-16 at 80mph. Hope that helps!

Are the numbers from the dic or hand calculated? If it’s from the dic did you have it reset to your current tire size?