GAS MILEAGE ON THE X5'S

[c4racer]

Originally Posted by RPX5

I get 14.7 on average (just reset computer about 5 days ago) with 03 4.4. My buddy has an 03 4.6is and he claims about 11-12.

It seems like our mileage is terrible when compared to face lift. Jsears, you're getting 16 with that 4.8??? How? Are the N62 V8s more efficient?

I get ~15 on average mixed city / highway driving in my 4.6is.

I see 18-20 on long highway trips depending on hills, wind, speed, etc.

[c4racer]

Originally Posted by dejay

With my 2004 4.8is, the fuel mileage depends on many things. Being in the mountains of NC, I average 15 - 16 MPG city / highway driving which includes mashing peddle at times. I had a trip to Myrtle Beach by myself; I used back roads adhering to the speed limit plus 5 over and averaged 21 MPG. I recently took my X5 to upstate NY with family of four, one dog and loaded down with luggage, I kept cruise 8 above speed limit except work zones and I got around 18 – 19 MPG. Still in my opinion impressive considering my old cars of a V6 Four Runner and a V8 Sequoia only at best 16 mpg highway.

Agreed - for the level of performance in the is, the mpg is not so bad at all. Better than previously owned 3/4t and 1/2t suburban, Titan, Armada, and not even that far off a nissan Murano AWD - but light years ahead of all of these in driving dynamics and power.

[greentrbo95gst]

I recently got 465 miles on I5 with 3 stops on a 2006 4.8is. I am testing it in mixed conditions (freeway/city) and so far 250 miles and a little less than half a tank left. Range shows 190 miles.

[TwinsPoppa]

Originally Posted by greentrbo95gst

I recently got 465 miles on I5 with 3 stops on a 2006 4.8is. I am testing it in mixed conditions (freeway/city) and so far 250 miles and a little less than half a tank left. Range shows 190 miles.

465 divided by 24 gallon tank = 19 MPG. Sounds about right to me.

12 MPG that I'm getting for the 4.8 isn't that bad but I get that same mileage from my 07 exploder too. I think there's something wrong with the Ford.

Uhhh .. nevermind. Seems it's spot on. Found this info. on the 4.6L Ford:
City MPG = 14
Highway MPG = 20

[greentrbo95gst]

Originally Posted by TwinsPoppa

465 divided by 24 gallon tank = 19 MPG. Sounds about right to me.

12 MPG that I'm getting for the 4.8 isn't that bad but I get that same mileage from my 07 exploder too. I think there's something wrong with the Ford.

Uhhh .. nevermind. Seems it's spot on. Found this info. on the 4.6L Ford:
City MPG = 14
Highway MPG = 20

Range still showed 39 miles to empty at 465, but i didnt wanna take a chance.

Try different plugs on your Ford, inflate the tires a little and clean out your maf.

[jdgden]

My 02 X5 4.4 used to show about 14 - 15 MPG, which also seemed to jive with my hand calculations, however, after a re-build on my transmission 18 month ago after which the computer MPG is now shows 18 - 19. In reality it still is 14-15 MPG so I suspect that the computer has been mis-reading it since the transmission work.

The indy repair shop said there was no way to recalibrate the MPG or that my mileage is better because the transmission is working properly (which I doubt).

If anyone knows if there is a way to easy way recalibrate, let me know. Otherwise, I'll continue to live with it because I am so sick of dealing with all the other repairs on the damn thing (in the last 12 months - air suspension/shock repair, leaky coolant repair, engine seal replacement, broken door handle, broker window, etc.). The only things keeping me in the car are my extended warranty and the way it still drives up the Colorado mountains.

[elmo]

Let's face it - we didn't buy them for their fuel economy. In the UK most E53 X5s are 3.0 Diesel! I chose to buy a 4.4 as I don't do a huge number of miles (and I like the sound of a V8). You guys in the USA are very lucky anyway - petrol prices (sorry - gas to you) here are well over £5 ( $7-50 ish) a gallon!

[TwinsPoppa]

Originally Posted by elmo

Let's face it - we didn't buy them for their fuel economy. In the UK most E53 X5s are 3.0 Diesel! I chose to buy a 4.4 as I don't do a huge number of miles (and I like the sound of a V8). You guys in the USA are very lucky anyway - petrol prices (sorry - gas to you) here are well over £5 ( $7-50 ish) a gallon!

Yeah, but we don't have mandated 35 hour work weeks either .. or has that been discontinued already?

[c4racer]

Originally Posted by TwinsPoppa

Yeah, but we don't have mandated 35 hour work weeks either .. or has that been discontinued already?

With the kooks in charge now in our government - anything is possible.....

[RickM5X3]

16.2 average per the OBC in mixed city/highway and at mile high elevation. 12ish towing 2,800 pound camper at highway speed and with 4 bikes on the roof cutting through the air. Worth every $ and cent of gasoline consumed.