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Thread: Rather interesting test on the E34 for the past week

  1. #1
    Join Date
    Sep 2005
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    Central Coast, CA
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    Default Rather interesting test on the E34 for the past week

    So I have been driving to barabra a couple times a week and did a little test on the MPG

    Couple things I noticed...now let me remind you that the times of the drive and the weather conditions were pretty much the same for all trials...there were no stops or presses on the breaks and the MPG averages were started once the car was on the freeway and on cruise control till the off ramp at my destination

    I noticed that @ 65MPH I got 31.1 MPG but interesting enough at 75MPH I got only 26.3MPG

    now this might be no biggie but I found it rather interesting how only an increase 10MPH can decrease fuel consumption by some much
    http://www.bimmernut.com/forum/image.php?type=sigpic&userid=3314&dateline=1239168  877

  2. #2
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    Gold Coast, Australia
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    The faster you go the more energy you'll need.

  3. #3
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    May 2006
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    Antwerp, Belgium
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    Quote Originally Posted by ArnZ! View Post
    The faster you go the more energy you'll need.
    by cube factor 'x to the third'
    2008 audi A3 1.9tdi
    (former 1991 520i LPG)

  4. #4
    Join Date
    Jan 2007
    Location
    Dayton Ohio
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    1,483

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    Its a BMW who cares about fuel consumption . I drive my Honda if I want to get there cheap. I drive my Bimmer for image........

  5. #5
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    Dec 2006
    Location
    Montreal
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    Default

    our cars are about as aerodynamic as a brick.

  6. #6
    Join Date
    Feb 2004
    Posts
    4,894

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    All cars runs optimally at certain speed have you tried to see what your fuel mileage is at 55MPH? I am wondering if you might get 35MPG at 55MPH.

    On a long run I did long ago... I got 24.4MPG average on a 800 miles run... but that got stops... and went into city a bit and back out... could have been about 25 or so if all highway and this is on a 540l. I guess the average speed for the trip was around 70 MPH.

  7. #7
    Join Date
    Dec 2003
    Posts
    235

    Default Great cars with great mileage.....

    Mixed mileage is in the 24's.
    I average 26.7mpg driving 70/80mph on TX roads!
    Now, If I drop the cruise down to 60 I get 29/30 and if I drop it down to 55 I get 31!

    The gas mileage on the GQ has been consistent since I've owned it!









    Quote Originally Posted by BMW4LIFE View Post
    So I have been driving to barabra a couple times a week and did a little test on the MPG

    Couple things I noticed...now let me remind you that the times of the drive and the weather conditions were pretty much the same for all trials...there were no stops or presses on the breaks and the MPG averages were started once the car was on the freeway and on cruise control till the off ramp at my destination

    I noticed that @ 65MPH I got 31.1 MPG but interesting enough at 75MPH I got only 26.3MPG

    now this might be no biggie but I found it rather interesting how only an increase 10MPH can decrease fuel consumption by some much
    "Uncle" Phil C
    2011 Kia Optima EX-P.
    Former owner of a 95 525i 5spd. "The GQ" aka A Shark in sheeps clothing
    03 R1150RT 6spd. "DaRTth"
    00 R1100R 5spd. "LeRoy"

  8. #8
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    Jan 2004
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    Benneton (United Colors of)
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    3,067

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    My EAT chipped 525i with autotrans has done between 35 and 36 US MPG at 55mph before. I don't remember if it was because I had put 87octane in, but wouldn't be surprised if that was the case.
    "..Torchinski v. Peterson that it is legal to carry a concealed weapon, so long the weapon is totally slick like a huge ass machine gun that you carry under a trench coat, like in the Matrix."


  9. #9
    Join Date
    Dec 2004
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    Sydney, Australia
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    "our cars are about as aerodynamic as a brick"

    This is the case. The drag coefficient of an e34 is 0.30 or 0.32 (can't remember which), that is damn low, as they have a decent tail-design, flush windows and the rest is very neatly done to meet the wind tunnel tests when they were the main vogue.

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

  10. #10
    Join Date
    Jan 2004
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    Lexington, Kentucky
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    Quote Originally Posted by genphreak View Post
    "our cars are about as aerodynamic as a brick"

    this is the case. The drag coefficient of an e34 is 0.30 or 0.32 (can't remember which), that is damn low, as they have a decent tail-design, flush windows and the rest is very neatly done to meet the wind tunnel tests when they were the main vogue.
    +1
    Thanks,

    1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment

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