Gas Mileage

Discussion in 'General Subaru Discussion' started by mike4king, Dec 19, 2014.

  1. mike4king
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    mike4king Well-Known Member

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    Didn't find any threads about it (although I didn't look super hard).

    This normal? (2015 WRX, all stock)

    [​IMG]
     
    Last edited: Dec 19, 2014
  2. tehfuzz
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    tehfuzz Well-Known Member

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    what application is that? also are those the numbers your car is putting up?

    seems about right for a wrx. lower 20's for hwy if you beat on it. if i dont beat on it while cruising on the hwy i get 25-35mpg

    It depends on what season it is too for fuel mixtures as well.
     
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  3. Nhibbs
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    Nhibbs Well-Known Member

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    Mileage looks too high. I get 12 mpg mixed highway/city. You are doing something wrong.
     
  4. mike4king
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    mike4king Well-Known Member

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    I use an android app called FuelLog. Car reads 2-3 mpg high but this is accurate. That's probably 80% gentle highway commuting and a little bit of fun mixed in. For this last tank that was actually 25.0 mpg, car read 27.3 mpg.
     
  5. idget
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    idget Want to pokéman? PM ShortytheFirefighter Staff Member

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    Definitely not normal. ~2100 miles a month? I drive that in a year.
     
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  6. SurlyOldManMN
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    SurlyOldManMN Omdat fok jou Staff Member

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    3-5 mpg variance is pretty normal if that's what you're asking. Mid 20's is not uncommon for a wrx.
     
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  7. idget
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    idget Want to pokéman? PM ShortytheFirefighter Staff Member

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    gas prices also look abnormal
     
  8. mike4king
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    mike4king Well-Known Member

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    minimum of 60 miles a day roundtrip for work, plus lots of other driving... :/

    Abnormal low or high? I've been starting to fill up at Sam's Club, they typically have the best prices on 92 octane
     
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  9. idget
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    idget Want to pokéman? PM ShortytheFirefighter Staff Member

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    I'm messing with you. I fill up once a month so have no idea what gas prices are most of the time.

    Gas mileage looks right. As for the discrepancy, thats pretty standard. Most cars count injector pulses and divide that over time to give you the dash readout. That calculation assumes perfect conditions and a clean burn. Lots of real world factors that effect the combustion efficiency (ethanol content, incomplete spark, etc) and distance reading (probably tire size depending on where the distance data is coming from) account for the difference. Use the dash gauge as a rough tool to track trends and as a precision tool (higher or lower then normal) then something like the app youre using if youre interested in accuracy.
     
  10. regularguySTi
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    regularguySTi New Member

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    I remember when I had my 4th gen LGT I was getting 12.8 average according to the GPS/screen thingy.
     
  11. Nhibbs
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    Nhibbs Well-Known Member

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    Was it a spec b?
     
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  12. regularguySTi
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    regularguySTi New Member

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    No, just GT... I wouldn't mind that 6 speed though..
     
  13. TSTRBOY2004
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    TSTRBOY2004 Well-Known Member

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    I bought a TDi Golf.. average 43-46mpg... even hit 49mpg one tank... sucks diesel prices havent dropped like gas...

    anyone who expects great mpg from an awd vehicle didnt think it through ahhahaha

    that being said.. I miss my FOZ

    Screenshot_2014-12-21-22-02-58.jpg
     
    Last edited: Dec 21, 2014
  14. mike4king
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    mike4king Well-Known Member

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    Lol I wasn't expecting great mileage. I came from a 2008 Civic, averaging 38mpg and getting up to 43mpg on a cross country tank once. I bought the AWD for the performance, wondering what kind of mpg I could push out of it :)
     
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  15. Cotts612
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    Cotts612 Well-Known Member

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    Best milage i've gotten in my 04 wagon is 29. Winter months im around 24-26.
     
  16. TSTRBOY2004
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    TSTRBOY2004 Well-Known Member

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    funny thing is if you have a stock car and take it to Nuke and do some mild tweaks.. you get better boost, more power and better mpg hahaha
     
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  17. Volatle
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    Volatle Well-Known Member

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    I've been adding lucas fuel treatment to every tank this winter and have noticed my car sounds better at start up and increased gas mileage. Unlike most fuel treatments, this isn't a harsh acetone based fuel additive. So it's able to be used on every fill-up with positive effects. I do not recommend using this on an older engine. As this product might clean carbon build up that maintains compression. If anyone has any more insight to lucas oil fuel treatment, that would be great.
     
  18. Nhibbs
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    Nhibbs Well-Known Member

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    FYI, those fuel treatments are BS...also the thing about breaking up carbon that maintains compression is a myth.
    That Lucas additive is just a light oil with a little detergent and will not give you any better gas mileage and only has minor cleaning properties. If you want to clean your fuel system periodically there are much better products (with PEA in them like Red Line fuel system cleaner or gumout) and if you want to increase your mileage fill up with good gas and stay out of boost.
    Adding something to your tank every time you fill up seems like a pain in the ass and would get expensive. Even if it did get you 1-2 mpg increase (it doesn't) the cost of the additive would negate any fuel savings
     
  19. tehfuzz
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    tehfuzz Well-Known Member

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    took a trip home from the iron range on a fresh tank and got about 27.3 mpg on the way home
     
  20. damian_mb
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    damian_mb Active Member

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    I stopped keeping track ever since I watched my gas gauge drop after WOT on the on ramp to get on the hwy.....there just isnt't a point anymore!

    I lose one bar going to and from work.....with grandpa driving. 18miles one way, I gave up.