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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Gas Milage



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      04-22-2009, 01:51 PM   #23
MrSpain
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I just got a 2007 328xi coupe with 30k miles, and the lifetime average is 17.2mpg. Very low right? Could there be something wrong with the car?
Also, is there a way to reset this counter?

Thx
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      04-22-2009, 01:58 PM   #24
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Quote:
Originally Posted by MrSpain View Post
I just got a 2007 328xi coupe with 30k miles, and the lifetime average is 17.2mpg. Very low right? Could there be something wrong with the car?
Also, is there a way to reset this counter?

Thx
- while displaying MPG hold left stalk button for about 3-5 sec.


In my 2007 328xi in Colorado:
- Very conservative commuting: 28-29mpg.
- Roof rack drops that to 25-26.
- Long distance interstate 30-33mpg.
- Haven't tracked it yet, but canyon carving drops it to 18 or so...
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      04-22-2009, 04:36 PM   #25
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Quote:
Originally Posted by nomile View Post
- while displaying MPG hold left stalk button for about 3-5 sec.


In my 2007 328xi in Colorado:
- Very conservative commuting: 28-29mpg.
- Roof rack drops that to 25-26.
- Long distance interstate 30-33mpg.
- Haven't tracked it yet, but canyon carving drops it to 18 or so...
For once I actually RTFM..
I meant the lifetime average, but I guess you can't reset that one as it would defeat the purpose. Resetting the trip average will do the job too.
I wish I could get that type of mileage. I'm going to try and see how it does on long trips, since NYC stop and go traffic is not ideal.
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      04-24-2009, 08:37 AM   #26
nomile
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Gotcha - not sure about the lifetime fuel economy counter (is that something only accessible with idrive? - I've been able to reset all FE counters that I found through non-idrive menus. Maybe I need to rtfm...)

Anyway, one thing to consider with my numbers: I live at about 7000ft, and work at about 5000ft. My understanding is that with a fuel injected car, where the ECU measures the exhaust gases and adjusts inputs accordingly, the fuel economy will actually increase (to a point) at the expense of lower power, IF the car starts of slightly overpowered for the specific driving conditions. Of course at some point you start giving it the beans, at which point the fuel consumption goes back up. Note that doesn't apply to carbureted cars, since the fuel input doesn't change, but the combustion is worse (wrong F/A mixture), and so you end up gassing it even more...

At 5000ft the O2 content is down by about 17%, and at 7000ft it's down by about 23% from sea level... See here

Don't know if the scaling is direct - couldn't find any info about this...
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      04-29-2009, 11:39 PM   #27
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i've been stuck at 18.8 for the past few months
i dont drive heavy at all! low and constant revs.
2007 328xi coupe.
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      04-30-2009, 06:14 AM   #28
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My lifetime average is 21.1 seems to always end up there after a few months of driving. I don't do all that much highway driving either.
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      04-30-2009, 01:03 PM   #29
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My drive is 50/50 highway/city, to and from work, but there is little traffic/lights when I drive. 700 miles on odometer so far. Total mpg 23 so far, on the highway with cruise control at 70, 30-32mpg
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      05-01-2009, 11:14 AM   #30
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2006 325xi w/stock wheels and continental stock tires

mix of freeway and city, been averaging 21/22 mpgs.

must be me, last two cars (GM) I also averaged 21/22 mpgs.


----
took this pic yesterday just for kicks



Last edited by chowser51; 06-07-2009 at 07:21 AM. Reason: adding pic
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