Elantra Scangauge city mileage update

Discussion in 'Hyundai Elantra / Lantra' started by unkadunk, Sep 15, 2007.

  1. unkadunk

    unkadunk Guest

    Well, the Scangauge I bought is working great, and I thought I'd share the
    new tank of gas mileage with the group.

    In -pure- city driving, and we're talking not any free speed length of more
    than a quarter mile, ninety percent on stop and go with lights and
    stopsigns every two or three blocks. But decent slow driving.

    At this point with close to half a tank used, 22.5 mpg. And still very
    slowly dropping.

    Frowny face.

    Normally it's a mixture of freeway and town, which puts it around 26 to 27,
    but this stint of stop and go really takes it's toll. The good part is
    that I know it will get around 40 on the road, which makes it a little
    better.

    But still impressively low I think.
     
    unkadunk, Sep 15, 2007
    #1
  2. With that little gas used, trip computers are not very accurate. It
    could easily be off by several mpg in either direction.
    Shutting off your engine at lights will help significantly.
    40? Not likely. Something in the range of 36, perhaps 37 is more like
    it, provided that you drive reasonably.
    What's impressive about low mileage?
     
    Brian Nystrom, Sep 15, 2007
    #2
  3. unkadunk

    unkadunk Guest

    .........

    Well, the one true trip I took that needed a fill-up off the interstate was
    right at 40 mpg. And the Scangauge in instant mileage mode hovers right at
    that rate on level ground (plenty where I live) at 65 - 70. Any faster and
    it heads down into high 30 figures you note. So it seems to be fairly
    accurate so far, albeit based on that one trip.


    I admit my verbiage incompetence. -Depressingly- low enough to make me
    look at the Prius web pages in envy. And halfway seriousness. Double city
    mileage is serious stuff (to me). Long term payoff or not.
     
    unkadunk, Sep 15, 2007
    #3
  4. If you're not filling up at the same pump or at least averaging the
    mileage over several fill-ups, you may get abnormal readings, since the
    shut-off setting on pumps varies considerably. Additionally, if a trip
    is one way, it can be affected by wind and terrain. 40 mpg is beyond
    what the Elantra is capable of averaging at normal highway speeds,
    though people who drive long distances at ~50 mph have seen that kind of
    mileage.
     
    Brian Nystrom, Sep 15, 2007
    #4
  5. unkadunk

    jmh_ottawa Guest

    I've started to keep track of my milage simply calculating it based on the
    amount of gas and distance travelled since the last fill up.

    I'm driving a 2002 2.0l Elantra.

    I do mostly highway driving around 100-120km/h which is about 60-70mph and
    get 39MPG or 8.6 l/100km for those north of the boarder like me ;-)

    Those figures are based on 6 fillups mostly from about 1/4 - 1/2 empty
    having travelled 2218km.

    The only thing i've really gained from this is that i drive a heck of a
    lot more than i thought. However, i am getting about what i expected from
    the data i've seen on my vehicle.
     
    jmh_ottawa, Sep 18, 2007
    #5
  6. unkadunk

    Oleg Lego Guest

    My math skills ain't what they used to be, but I don't think 39 MPG
    equates to 8.6 l/100km.
     
    Oleg Lego, Sep 18, 2007
    #6
  7. unkadunk

    jmh_ottawa Guest

    LoL If it isn't then the online calc i'm using doesn't work haha
     
    jmh_ottawa, Sep 20, 2007
    #7
  8. unkadunk

    Oleg Lego Guest

    Try the one at http://www.euronet.nl/users/grantm/frans/fuel.html

    If you want to do it yourself, here are some conversions for various
    parts of the process. I found these at

    http://en.18dao.net/Measure_Conversion/fuelconsumption

    ------------------
    To change into

    miles per gallon (UK) miles per gallon (US) multiply by 0.833
    miles per gallon (UK) miles per litre multiply by 0.22
    miles per litre miles per gallon (UK) multiply by 4.546
    miles per gallon (UK) kilometres per litre multiply by 0.354

    miles per gallon (US) miles per gallon (UK) multiply by 1.2
    miles per gallon (US) miles per litre multiply by 0.2642
    miles per litre miles per gallon (US) multiply by 3.785
    miles per gallon (US) kilometres per litre multiply by 0.4251

    X miles per gallon gallons per 100 miles: divide 100 by X
    (both gallons must of the same type)

    X miles per gallon (UK) litres per 100 km: divide 282.5 by X
    X miles per gallon (US) litres per 100 km: divide 235.2 by X
    X km per litre litres per 100 km: divide 100 by X
    X miles per litre litres per 100 km: divide 62.14 by X

    -----------------

    I wrote up a little spreadsheet using these conversions. I'd email it,
    but it's so simple, I'll just write it this way:

    Cell Contents
    ---- --------------------------------
    A1 MPG -> litres/100km
    C1 litres/100km (US Gal)
    E1 litres/100km (Imp Gal)

    A2
    C2 =IF(A2;100/(A2*0.4251);0)
    E2 =IF(A2;100/(A2*0.354);0)

    A4 Litres/100km -> MPG
    C4 MPG (US)
    E4 MPG (UK)

    A5
    C5 =IF(A5;100/A5*0.6213712*3.785;0)
    E5 =IF(A5;100/A5*0.6213712*4.546;0)
    -----------------------------------------

    A1, C1, D1, A4, C4, E4 are all strings

    Enter MPG in A2

    Enter litres/100km into A5
     
    Oleg Lego, Sep 20, 2007
    #8
  9. unkadunk

    jmh_ottawa Guest

    Yep looks like the online calc i was using sucked..

    Over 3384km of driving during the past month i'm getting 28.5 us mpg and
    8.32 l/100km not as low as it could be but driving at 100-120km/h doesn't
    help i'm sure.
     
    jmh_ottawa, Sep 27, 2007
    #9
  10. At speeds in the 100-110 KPH range on the highway, you should be able to
    get over 35 mpg, if your car has a manual transmission.
     
    Brian Nystrom, Sep 28, 2007
    #10
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