My gas mileage has gone down...alot

Discussion in 'Modifications And Maintenance' started by B1Bone, Aug 7, 2006.

  1. B1Bone
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    B1Bone BANNED

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    Something has happened and I can't figure it out.

    Normally on the sti people get around 260-270 miles per tank right?

    Well, as of late I've been getting aroung 12mpg IF I'm LUCKY!

    I went through a whole tank except for maybe an eighth and didn't even reach 200 miles. Driving habits have NOT changed, I may have even tried to consume less fuel.

    What could have happened and what should I do?
     
  2. wrxpeed
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    wrxpeed CobraPeed

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    sounds like what's happened to me. I was getting 300 miles a tank, now i'm lucky to hit 200 miles a tank..... wait, there's an explaination for mine.
     
  3. redheat86
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    redheat86 Well-Known Member

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    ****, i wish i could hit 260-270 on a tank in my sti, and i drive conservatively for damn near most of the tank.

    i pull about 225-240 regularly. and 240 is very rare haha

    this is on a 2006 with 2900 miles
     
  4. carl
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    carl Well-Known Member

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    yea, i noticed my STi has some sucky mileage. and another thing, the needle doesn't seem to go to full, just over 3/4's usually. is this a common problem? or maybe i should try a new gas station lol - it's happened the last 2 times i've bought gas (both from the same station)
     
  5. B1Bone
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    B1Bone BANNED

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    just went through a quarter of a tank today. 38.5 miles. I usually get around 50-60.

    WHAT'S GOING ON!!?!?!?!?
     
  6. KSAL
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    KSAL Well-Known Member

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    YEah in my STi i usually get around 140-180 miles on about 3/4's of a tank. I use 92 and i ulually drive conservitvly, shifting around 2.5-3 . Is that normal or not? I bet exon is having all of their workers take a poo in our gas now just cuz they wanna stick it to us more.
     
  7. kickin_81
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    kickin_81 Well-Known Member

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    It's very odd that this is happening to everyone at the same time. Did the law for 20% ethanol in MN gas stations go into effect? Either that or Subaru found a way to reset all STi ECUs at the same time. :eek:
     
  8. Iroc-Z
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    Iroc-Z Well-Known Member

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    I know I dont have an STI but I run non oxy gas in my 02 and I will easialy hit 300 every 3/4 tank. And I drive in rush hour every day. I also drive my car in the boost. Co-workers of mine all use non oxy and they say they get better fuel milage to.
     
  9. carl
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    carl Well-Known Member

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    non-oxy is out of my way. the inconvenience outways the potential benefit for me in this case.

    i ran non-oxy once in my 240 - didn't notice any difference really

    i guess it's time to start using the cruise control more often
     
  10. Wgp assassin
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    Wgp assassin New Member

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    i believe its the heat. everyone at work has been having the same prob
     
  11. Dream
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    Dream Well-Known Member

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    Ive noticed the same thing with my car, but with all the stuff done to it I thought that was it. I got 285 miles out of one tank last weekend so I guess thats not too far off.
     
  12. austinpike
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    austinpike Well-Known Member

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    common. when the auto-shut off happens, try putting more in, but only put the pump handle at the first click/notch/whatever. Doesn't happen a lot, but topping it off slowly like that has worked for me the few times it has.
     
  13. carl
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    carl Well-Known Member

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    thank you for the information - i will give that a try next time i'm at the pump :cool:
     
  14. hofit
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    hofit Well-Known Member

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    I wish I could help but I went from 21-23 mpg to about 12-14 mpg but it's ALL driving habit.
     
  15. Frogy
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    Frogy Well-Known Member

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    this may seem stupid but could it be air conditioning?

    I noticed recently that my WRX gets about 4 MPG better even on the highway without the air
     
  16. carl
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    carl Well-Known Member

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    i don't use the air unless its absolutely unbearable, so thats probably not it for me
     
  17. Iroc-Z
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    Iroc-Z Well-Known Member

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    Just thought I would let everyone know that I ran my tank from full to empty and got 300 miles to a tank of non oxy 91. I would say I drive my car somewhat agressivly. Most driving was city and traffic.
     
  18. LVT
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    LVT Well-Known Member

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    i dunno about you guys but i'm getting 400miles a full tank.
     
  19. 06WRXss
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    06WRXss New Member

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    I get roughly get 22 - 25mpg on my WRX.
    Before my first oil change I got around 27mpg.

    I tend to accelerate quickly and quite often from a stop or when passing/merging, but I cruise aroung 65mph on the free way and that makes a big differnece in gas cunsuption when cummuting every day.
     
  20. Dream
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    Dream Well-Known Member

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    non turbo ftw
     
  21. Iroc-Z
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    Iroc-Z Well-Known Member

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    Actully if I drive straight hyw with cruise I can get like 350 to a tank.
     
  22. readymix
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    readymix ...Lest ye be trod upon... Staff Member

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    YAY, now everyone gets the craptastic gas mileage I've been getting for nearly a year.
     
  23. AWDimprezaL
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    AWDimprezaL has more posts than you

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    non turbo, 2.2, catless, and a 2.5 dohc computer FTL 230 miles to a tank weak sauce...good thing for both of my cycles.
     
  24. STi hog
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    STi hog Well-Known Member

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    I'm getting 250 miles in my STI and i'm mostly all hwy miles
     
  25. driftin240
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    driftin240 Well-Known Member

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    Heat will kill your MPG and so will using more ethanol. Ethanol kills fuel economy in cars that are not supposed to run it. Drive a flex fuel vehicle once... It's better for the economy they say.... not when your "regular" mpg rating is 20 and when you run the e-85 in the flex fuel garbage car it goes down to 12-14mpg.

    You guys aren't running Holiday piss water in your cars are you?
     
  26. 83projectbrat
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    83projectbrat New Member

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    hahaha my 04 sti is the same way.. i get like 200-230 a tank BUT i have a solution for my problem..

    1.cobb stage 2
    +
    :)fun... after that
    +
    my foot got heavy after stage 2
    = not good mpg
     
  27. Vila
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    Vila New Member

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    Everyone check your tires pressures. That is the most common mileage killer and is so easy to overlook.

    I too had a drop in my gas mileage a couple years ago. It improved again once I switched from regular Valvoline to synthetic motor oil. That may have just been a coincidence though.