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Got an '06 LE a few weeks ago and have now gone through 3 tanks of gas. With a whopping 745 miles on the vehicle I have calculated my mileage to between 9 - 9.65 mpg. This has been almost all city driving -- by my wife so not very aggressive driving at all. I did put 22's on it immediately but at this point 12mpg seems like it would be pretty good.


Any ideas???
 

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Nav400 said:
Got an '06 LE a few weeks ago and have now gone through 3 tanks of gas. With a whopping 745 miles on the vehicle I have calculated my mileage to between 9 - 9.65 mpg. This has been almost all city driving -- by my wife so not very aggressive driving at all. I did put 22's on it immediately but at this point 12mpg seems like it would be pretty good.


Any ideas???
welcome, Sweet ride, nice color too, go through the interior, exterior and performance modification threads, to have any idea what are the guys doing to their rigs :bow:
 

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Nav400 said:
Got an '06 LE a few weeks ago and have now gone through 3 tanks of gas. With a whopping 745 miles on the vehicle I have calculated my mileage to between 9 - 9.65 mpg. This has been almost all city driving -- by my wife so not very aggressive driving at all. I did put 22's on it immediately but at this point 12mpg seems like it would be pretty good.


Any ideas???
Yes, that's right on in my view. I have no idea how an Armada can get 13 mpg in 100% stop and go driving. I have the NAV computer so I get immediate read-outs of gas milleage. I have found that your results are accurate for 100% stop and go. I drive 13 miles to work. About 65% freeway, and I get 14 mpg.

Couple of other interesting notes about MPG with Armada's. Driving 40 mph does not yield better fuel economy that 70.:huh: Never had a vehicle that did that before...maybe I just didn't know it! Also, hammering it a few times doesn't adversely affect mpg that much. I guess the idea is "How much worse could it be?"

The good thing regarding MPG is I get over 12 pulling my 3000 lb boat crusing mostly 70 mph on the freeway. Nice :)
 

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wwjdwithca said:
Yes, that's right on in my view. I have no idea how an Armada can get 13 mpg in 100% stop and go driving. I have the NAV computer so I get immediate read-outs of gas milleage. I have found that your results are accurate for 100% stop and go. I drive 13 miles to work. About 65% freeway, and I get 14 mpg.

Couple of other interesting notes about MPG with Armada's. Driving 40 mph does not yield better fuel economy that 70.:huh: Never had a vehicle that did that before...maybe I just didn't know it! Also, hammering it a few times doesn't adversely affect mpg that much. I guess the idea is "How much worse could it be?"

The good thing regarding MPG is I get over 12 pulling my 3000 lb boat crusing mostly 70 mph on the freeway. Nice :)
I noticed that too. Driving long trips I can get almost 19mpg with my stock tire 80mph or so.
 

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Nav400 said:
Got an '06 LE a few weeks ago and have now gone through 3 tanks of gas. With a whopping 745 miles on the vehicle I have calculated my mileage to between 9 - 9.65 mpg. This has been almost all city driving -- by my wife so not very aggressive driving at all. I did put 22's on it immediately but at this point 12mpg seems like it would be pretty good.


Any ideas???
City lowers mileage. 22" lower mileage. Etc.
Is it a 4wd?
Use cruise control, pull away from lights at a reasonable pace, make sure you aren't driving in 4 instead of D. They are both at the same position on the shifter, but one is left, the other right, etc. (I did this on my test drive so I know it is an easy mistake. ;) ) I drive like a maniac and get 12 mpg in my 4wd LE. I keep it in 2wd and cruise on the highways. Get about 16-17 highway. BTW, what is your tire size instead of rim size. If you have a different outer diameter, this can affect how your mileage is reported.
 

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Have you ever thought about....

Your speedometer/odometer is now inaccurate with the larger rims/tires? Not sure if you were able to maintain the OEM overall diameter or not? If your wheels are indeed a tad larger diameter, then you would be showing fewer miles than acutal on your ride and milage might be better than you think? Not trying to be a S.A. here, as I have had a similar thing happen to me with a different vehicle.

Just something to think about. Might speed check with a buddy at 55mph down the interstate and see if it is reading like 50mph or so?

Good luck,

ST

wwjdwithca said:
Yes, that's right on in my view. I have no idea how an Armada can get 13 mpg in 100% stop and go driving. I have the NAV computer so I get immediate read-outs of gas milleage. I have found that your results are accurate for 100% stop and go. I drive 13 miles to work. About 65% freeway, and I get 14 mpg.

Couple of other interesting notes about MPG with Armada's. Driving 40 mph does not yield better fuel economy that 70.:huh: Never had a vehicle that did that before...maybe I just didn't know it! Also, hammering it a few times doesn't adversely affect mpg that much. I guess the idea is "How much worse could it be?"

The good thing regarding MPG is I get over 12 pulling my 3000 lb boat crusing mostly 70 mph on the freeway. Nice :)
 

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92TripleBlack said:
City lowers mileage. 22" lower mileage. Etc.
Is it a 4wd?
Use cruise control, pull away from lights at a reasonable pace, make sure you aren't driving in 4 instead of D. They are both at the same position on the shifter, but one is left, the other right, etc. (I did this on my test drive so I know it is an easy mistake. ;) ) I drive like a maniac and get 12 mpg in my 4wd LE. I keep it in 2wd and cruise on the highways. Get about 16-17 highway. BTW, what is your tire size instead of rim size. If you have a different outer diameter, this can affect how your mileage is reported.
Why would a 22" wheel lower your MPG? Assuming the OD is the same as stock.
 

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It could be inferred that the larger mass, read: more spinning metal would increase the resistance which might decrease milage. My point, albeit a different one...was there is a high probability that the tires/rims are LARGER diameter OD than stock. If the OD is the same as OEM, man...cant imagine 22" would cost a man 3 mpg. Ouch!

ST

casinojames said:
Why would a 22" wheel lower your MPG? Assuming the OD is the same as stock.
 

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casinojames said:
Why would a 22" wheel lower your MPG? Assuming the OD is the same as stock.
The higher the unsprung weight the harder it is to push the wheel and tire combo, so yes that will affect your mpg as well. It will also affect acceleration. Many performance car owners swear by stock rim sizes for best acceleration. I've heard many a story where a guy drives a car that's setup almost exactly as his car, but has bigger wheels and the they swear that it's not as quick as their car with the smaller wheels.
 

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Any NASA engineers on the site that can help us out with a rotational mass vs. acceleration vs. deceleration vs. well hell why not add air resistance in to the equation since we don't live in a vacum.
 

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casinojames said:
Any NASA engineers on the site that can help us out with a rotational mass vs. acceleration vs. deceleration vs. well hell why not add air resistance in to the equation since we don't live in a vacum.

'cause the mo ya push da pedal da mo faster da gas go away.
 

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sturner06 said:
....

Just something to think about. Might speed check with a buddy at 55mph down the interstate and see if it is reading like 50mph or so?

Good luck,

ST
If you did it at 100 it would be easier to calculate the percentage difference :D
 

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Its easy to calculate if you have the outer tire diameters. No way to do it with rim size. As for 22" affecting mileage, acceleration, etc. it sure does. Race cranks cost $500 more to loose 20 lbs of rotating mass so they can go faster. 22" rims add more than that per tire.
 

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Good Point! I think I will stick with the good 'ole 18s! LOL

Waiting for Bridgetone to release the Dueller A/T Revo in 18"...arguably the All Terrain Tire on the market! Had them on my 7000 lb plus Duramax MegaTruck for 40,000 miles and they wore like a champ!!!! Sold it and they had > 50% tread left, albeit the latter tread prolly no last as long as the early 50% but still. Highly rated and ever higher recommended, if you can find them. Sorry to be Off Topic on this one. ;-) :eek:fftopic:

92TripleBlack said:
Its easy to calculate if you have the outer tire diameters. No way to do it with rim size. As for 22" affecting mileage, acceleration, etc. it sure does. Race cranks cost $500 more to loose 20 lbs of rotating mass so they can go faster. 22" rims add more than that per tire.
 

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sturner06 said:
Good Point! I think I will stick with the good 'ole 18s! LOL

Waiting for Bridgetone to release the Dueller A/T Revo in 18"...arguably the All Terrain Tire on the market! Had them on my 7000 lb plus Duramax MegaTruck for 40,000 miles and they wore like a champ!!!! Sold it and they had > 50% tread left, albeit the latter tread prolly no last as long as the early 50% but still. Highly rated and ever higher recommended, if you can find them. Sorry to be Off Topic on this one. ;-) :eek:fftopic:

Me too, I want some too!! I just put Revos on our 4Runner (replaced std Bridgestone ATs, great tire too) and pray they make some 18"s also.
 

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Asumming the 22" tires are the same circumfrence as 18" with stock tire, theoretically should have not effect on gas mileage if they weighed the same. 22" weigh about 85-95 lbs. per wheel with tires would be one factor in mpg. The width compare, 22" 305 to a 18" 265 width would also play a factor in mpg. Definitely what type of tread you are using, mud terrain, all season, all terrain, or performance. And of course tire pressure. Does this make sense? :)

What do you all think?
 

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casinojames said:
Any NASA engineers on the site that can help us out with a rotational mass vs. acceleration vs. deceleration vs. well hell why not add air resistance in to the equation since we don't live in a vacum.
Not a NASA engineer, just a normal engineer. I have a spreadsheet to calculate different tire sizes and speed differences. Try this link. http://www.citlink.net/~kjessee/Tire Size Calculator.xls
 

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http://www.1010tires.com/TireSizeCalculator.asp

Try this one. Gives you this with pretty graphics. ;)

Stock Tire - 265/70R18 Tire 1 - 305/55R20

Section Width: 10.43 in 265 mm Section Width: 12.00 in 305 mm

Rim Diameter: 18 in 457.2 mm Rim Diameter: 20 in 508 mm

Rim Width Range: 7 - 9 in Rim Width Range: 9 - 10 in

Overall Diameter: 32.60 in 828.04 mm Overall Diameter: 33.20 in 843.28 mm

Sidewall Height: 7.30 in 185.42 mm Sidewall Height: 6.60 in 167.64 mm

Radius: 16.30 in 414.02 mm Radius: 16.60 in 421.64 mm

Circumference: 102.4 in 2600.9 mm Circumference: 104.3 in 2649.2 mm

Revs per Mile: 638.0 Revs per Mile: 626.5

Actual Speed: 60 mph 100 km/h Speedometer1: 58.9 mph 98.1 km/h

Speedometer Difference: - Speedometer Difference: 1.835% too slow
Diameter Difference: - Diameter Difference: 1.81%
 
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