Useless Information

[swathdiver]

Man with all the up and down hills bere I’m at 14.3 MPG average. But thats with my cam and leveling kit so I’m not doing too bad. Do you have the 4 speed or 6 speed?
Edit: turning phone sideways shows ur sig, which states 6 speed.

can you upload that spreadsheet?

14.3 MPG is the average for ALL variations of the GMT900 SUVs, long and short, first year to last save for Hybrids.

Upload it to where? Send me an email, I'll clean up the file and send it over.

 

[Big Mama]

this one. I don’t have flex so I’m wondering if you fill up with different types of gas. Interesting

That tank had a remnant of 5 gallons of 96octane mixed fuel along with 4 gallons ofE85 and 22 gallons of Unleaded 88/E15.

 

[Thauber]

14.3 MPG is the average for ALL variations of the GMT900 SUVs, long and short, first year to last save for Hybrids.

Upload it to where? Send me an email, I'll clean up the file and send it over.

Interesting, I would have assumed it would have been better than the NBS being these have the 6-speed tranny. Known reason for the low mpg?

 

[R3cord303]

Interesting, I would have assumed it would have been better than the NBS being these have the 6-speed tranny. Known reason for the low mpg?

Could be that they’re heavier, bigger, and more powerful.

 

[gooffeyguy]

Does a leveling kit affect mileage?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Thauber]

Could be that they’re heavier, bigger, and more powerful.

Compared my '04 to an '09 equivalent. The nnbs is only 300 lbs heavier, 15 more HP, and 5 more torque. Extremely minimal difference.
Is it maybe tied with the use of E85? Mine is a flex as well, but I only use plain old 87 octane.

 

[Sam Harris]

Compared my '04 to an '09 equivalent. The nnbs is only 300 lbs heavier, 15 more HP, and 5 more torque. Extremely minimal difference.
Is it maybe tied with the use of E85? Mine is a flex as well, but I only use plain old 87 octane.

Yes, E85 yields approximately 3-3.5 MPG less than standard 91 octane.

 

[R3cord303]

Compared my '04 to an '09 equivalent. The nnbs is only 300 lbs heavier, 15 more HP, and 5 more torque. Extremely minimal difference.
Is it maybe tied with the use of E85? Mine is a flex as well, but I only use plain old 87 octane.

Yes, E85 yields approximately 3-3.5 MPG less than standard 91 octane.

Is the 14.3 mpg average part of the EPA quoted rating or user supplied real world testing? Because I don’t think the EPA rating would use E85

 

[Thauber]

Is the 14.3 mpg average part of the EPA quoted rating or user supplied real world testing? Because I don’t think the EPA rating would use E85

I can't speak for where Swathdriver got his numbers, but I'm guessing experience and research. The link below does show EPA for an '09 on straight E85. Interesting to see his custom mixtures fall in line with those estimates for E85. Awesome he took time to make the spreadsheets.

https://www.fueleconomy.gov/feg/bymodel/2009_GMC_Yukon.shtml

 

[HiHoeSilver]

Does a leveling kit affect mileage?

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

Probably not by itself, but the 60 lb, 33" × 10+" tires that usually go on sure do.