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View Full Version : MPG on the 04 4.4 vs 03 4.4


krzn94
01-05-2008, 10:49 PM
Is there really a big difference in the gas mileage between the 03 and the 04 with the 4.4 motor? Online I read that the 04 was 3 MPG better than the 03 :dunno:?? It also said that the MPG on the 04 4.4 was better than 01-06 3.0 motors?? Can anyone help me understand this?
Thanks for your help as I am looking to purchase an x5 within a week or 2 and don't want to spend more than 32k
Thanks Again..

jcl10
01-05-2008, 11:11 PM
For the 4.4, the '04 is better than the '03, due to the valvetronic feature. 3 mpg is possible, but your driving style makes a large difference.

The 4.4 is not better than the 3.0. In '04 the 4.4 came close to the 3.0 (which did not have the valvetronic, and used the previous technology) but that is for published figures, not necessarily real world figures. For the EPA test, which is run on a dyno and not on the road, there is a prescribed acceleration rate, which is the same for both vehicles. In that situation, the mileage figures are similar. Realize that on a dyno the increased weight of the 4.4 doesn't show up either. In the real world, drivers tend to use the power of the 4.4 and then the mileage is not close to the 3.0.

There is also some difficulty comparing year to year, apart from the '04 change for the 4.4, as the test has been revised to try and make it more realistic, so direct comparisons of published numbers are not always possible. You won't necessarily get the mileage the EPA sticker showed in any case.

In the real world, the 3.0 has the best mileage, the post-'04 4.4 is next, and the original 4.4 is worst (leaving aside the 4.6 and 4.8 models).

krzn94
01-06-2008, 05:57 PM
What kind of Gas MPG do you get on your 3.0?

For the 4.4, the '04 is better than the '03, due to the valvetronic feature. 3 mpg is possible, but your driving style makes a large difference.

The 4.4 is not better than the 3.0. In '04 the 4.4 came close to the 3.0 (which did not have the valvetronic, and used the previous technology) but that is for published figures, not necessarily real world figures. For the EPA test, which is run on a dyno and not on the road, there is a prescribed acceleration rate, which is the same for both vehicles. In that situation, the mileage figures are similar. Realize that on a dyno the increased weight of the 4.4 doesn't show up either. In the real world, drivers tend to use the power of the 4.4 and then the mileage is not close to the 3.0.

There is also some difficulty comparing year to year, apart from the '04 change for the 4.4, as the test has been revised to try and make it more realistic, so direct comparisons of published numbers are not always possible. You won't necessarily get the mileage the EPA sticker showed in any case.

In the real world, the 3.0 has the best mileage, the post-'04 4.4 is next, and the original 4.4 is worst (leaving aside the 4.6 and 4.8 models).

jcl10
01-06-2008, 10:47 PM
Search is your friend :)

http://www.bimmerfest.com/forums/showthread.php?t=252451