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Discussion Starter · #1 ·
On a big truck like the QX80 fuel economy is a very important factor unless you own an oil derrick...

I've pulled consumer submitted fuel economy numbers from Fuelly, and placed them side by side with EPA rated numbers. Keep in mind user submitted economy is at the mercy of the individuals driving style, while the EPA tests are standardized yet ignore many nuances of day to day driving...

Infiniti QX80
Fuelly: 13.5 mpg (2008 most recent figure)
EPA: 14 city/20 highway/16 combined

Mercedes GL350
Fuelly: 24.4 mpg (DIESEL Figures, Petrol not submitted)
EPA: 14 city/19 highway/16 combined

Range Rover
Fuelly: 15.2 mpg
EPA: 13 city/19 highway/15 combined

Lexus LX570:
Fuelly: 15.1 mpg
EPA: 12 city/17 highway/14 combined

QX80 takes the cake for efficiency EPA wise, comparing Fuelly figures is a little difficult because data is partially incomplete. I wonder if the QX80 benefits from its aerodynamic design over its boxier competitors like the Mercedes and Lexus (which obviously suffers)
 

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Well the GL350 figures aren't going to be fair..

Find the petro figures. They have to be out there somewhere..

Ever try fuelly? Or that government website that shows the mileage for all the cars?
 

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Discussion Starter · #3 ·
Well the GL350 figures aren't going to be fair..

Find the petro figures. They have to be out there somewhere..

Ever try fuelly? Or that government website that shows the mileage for all the cars?
thats where all these figures came from, Fuelly only has diesel figures for the GL, thats why i noted it was diesel figures. The EPA figures came from http://www.fueleconomy.gov/

To be honest i dont see many petrol GLs driving around, probably has to do with the prince increase MB has baked into the GL for petrol engines..

Interesting that QX80 does so well in fuel economy comparisons considering it is the only one here with pickup truck bones...
 

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According to consumers the QX80 has the worst mpg rating out of all the vehicles listed here. As far as the EPA is concerned the vehicles are basically the same with the Range Rover and Lexus being slightly worse. This comparison doesn't really make anything more clear. After this I am just more confused about which vehicle is most fuel efficient. :S
 

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thats where all these figures came from, Fuelly only has diesel figures for the GL, thats why i noted it was diesel figures. The EPA figures came from Fuel Economy

To be honest i dont see many petrol GLs driving around, probably has to do with the prince increase MB has baked into the GL for petrol engines..

Interesting that QX80 does so well in fuel economy comparisons considering it is the only one here with pickup truck bones...
interesting why its so difficult to find the MPG for the petro

Well I think I know why the GL sells so well then

Because its the only one to offer a diesel.
 

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Discussion Starter · #6 ·
According to consumers the QX80 has the worst mpg rating out of all the vehicles listed here. As far as the EPA is concerned the vehicles are basically the same with the Range Rover and Lexus being slightly worse. This comparison doesn't really make anything more clear. After this I am just more confused about which vehicle is most fuel efficient. :S
it gets skewed by sample size, the QX80 has like 2 user submitted mileages and its all dependent on how they drive. The larger the sample gets the easier it is for outliers to become insignificant. You can turn the Prius into a pig with a lead boot.
 

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Agreed.

Its hard because we have to purchase based on manufacturer based mileage claims.

And many times they aren't accurate.
 

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Agreed.

Its hard because we have to purchase based on manufacturer based mileage claims.

And many times they aren't accurate.
it's the downside of buying a car but usually the original claims aren't too far off from the real life numbers, so in the end it can't be that bad, at worst you will be spending a few dollars more per tank than you expected.
 
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