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  1. #1
    flukecapecod
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    What kind of gas mileage ar you guys getting ?

    3 years ago I was getting 30 MPG highway and 25 MPG around town
    now I am getting 25 MPG highway (at 80 MPH) and 21 MPG around town.

    I have the 2.8L

    a K&N air filter and I am thinking its to porous and dust is getting on my MAF Sensor and messing up the reading and sending a bad signal and its causing to much gas to enter my engine.

    anyways just wanted to se what you guys are getting for mileage.


  2. #2
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    Re:

    That is a pretty big difference for a dirty air filter. Sometimes oiled filters deposit some oil on the sensor than over time the sensor accumulates sludge. Maybe clean the filter (or go back to paper), pull the sensor and spray it with a cleaner may for that purpose.

    Just guessing.

  3. #3
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    28 / highway, 8 / track. S52 "M". :o)

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  4. #4
    dk
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    2.8 - 23 mixed, 16 city

    I've always suspected something might be amiss, but that's the way it's always been.

    I do have the Conforti software installed, did that as soon as I got her, so no idea what the before was like. Also, I drive like an [Oops!], and I rarely drive on the highway, so...?

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    S54 ~ 22-25 if I'm lucky.

    I've always thought that was low, but I cane it regularly, so.....

    Kevin 368s #19


  6. #6
    kieskaman
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    3.0- 5speed with Dunlop Sport Max

    29 HWY/23 CITY plus the occasional 15-20 over every 11 months from "Officer Friendly"

  7. #7
    flukecapecod
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    How are you managing such a big drop (track)

    what are you running a something the size of a garden hose for a fuel line.. I can't fathom you getting 8 mpg. no matter how much of a madman you are at the track.

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    lol, that's life spent at WOT :-)

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  9. #9
    flukecapecod
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    Your car might be worth investigating why 16 mpg

    this would become valuable information for all of us, to take into coonsideration.

    I have come to believe its the MAF sensor at the intake . The reason being is I replaced mine with another used one out of a 3-series(supposebly a proper match) and everything spec's out ok, but my mileage went from 30 highway to 25 highway and I do drive almost daily at 80+ mph on the highway here. and found it odd as well that my mileage around town dropped proportionally. odd...oddd...oddddd

  10. #10
    flukecapecod
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    do you really think tires make that big a diffrenc

    I had the Dunlops way back, but never took that into consideration as a major factor, I figured only a slght difference

  11. #11
    dp
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    pretty typical of track driving actually.

    8-10 mpg for a coupe is normal on the track. a lotus elise gets 10-11 mpg. i ran an m5 once and got 4 mpg. yep, that would be half a gallon per lap at many tracks.

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    Like PaulR ...

    28 mpg is my best on a trip to CA, but 9 when playing on the track. In the city, pretty consistent 21-22 mpg, as ever since I've owned the car (bought new 5/12/99), I've always kept track of gas fill-ups ... I'm on page 24 of my "little book". ;)

  13. #13
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    My stock 2.8 engine gets less than 7.5 mpg

    Okay, it's got software and some bolt-ons.--
    <a href="http://www.godoggoracing.org/">Go Dog Go Racing</a>

  14. #14
    dp
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    your engine may be stock, your right foot isn't ;)


  15. #15
    dp
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    a percent or two unless you do something radical

    like run huge slicks at 12 psi or spacesaver spares at 100 psi.

    inflation pressure will generally have more effect on mileage than tire type, within reason. there are exceptions but that's the rule.

  16. #16
    flukecapecod
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    Re: drilled out the injectors to a 1/2" bore

    thats nuts..........




    (how can I do it to mine ?)

  17. #17
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    Um, gotta pass those E92 M3s. :]

    car's basically stock, with a bit of neg-camber. Street tires.
    <IMG SRC=http://mydrive.roadfly.com/photos/pic.php?u=73302r2fUS&i=2642><FONT FACE="Comic Sans MS" COLOR=Gray SIZE=+1>PaulR</FONT>
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