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Thread: Gas Mileage

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    Senior Member bigcol is an unknown quantity at this point bigcol's Avatar
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    Question Gas Mileage

    Why am I getting such bad gas mileage ?

    I am running stock 2006 A3 on Sunoco Gold, I am still only getting around 430 km's on a full tank. Recently changed the air filter and spark plugs and still no improvement ! I am not running snow tires.

    Any recommendations on how I can improve the gas mileage ?
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  2. #2
    Moderator EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay's Avatar
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    Ya that's low dude. I usually ran Sunoco or Petro 91 octane and would average about 525 a tank from full to gas light, higher if it was all highway and I drive calmly.

    Are you driving city or hwy? properly inflated tires? It's possible the winter fuel and driving type/confitions could lower you a bit. You said Sunnoco gold, is that 94 Octane? Unless your running a 93 octane program there's no reason to go over 91 octane and may even hurt milage.

  3. #3
    Moderator Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas has a reputation beyond repute Ricas's Avatar
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    Change to Shell V-Power. Sunoco uses ethanol in their fuel with makes the fuel burn faster. It should improve your mileage by about 50km per tank, me thinks. At least that's what I noticed when I switched from Sunoco Ultra 94 to Shell V-Power on my 1.8T.
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    Senior Member chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix's Avatar
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    Simple thing you can change also is your driving habits, Unless you drive like a grandpa already.
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    Quote Originally Posted by EMSbyDay View Post
    Ya that's low dude. I usually ran Sunoco or Petro 91 octane and would average about 525 a tank from full to gas light, higher if it was all highway and I drive calmly.

    Are you driving city or hwy? properly inflated tires? It's possible the winter fuel and driving type/confitions could lower you a bit. You said Sunnoco gold, is that 94 Octane? Unless your running a 93 octane program there's no reason to go over 91 octane and may even hurt milage.
    Thats pretty low too man....for a 2.0T engine.

  6. #6
    Senior Member yamahammer is a jewel in the rough yamahammer is a jewel in the rough yamahammer is a jewel in the rough yamahammer is a jewel in the rough yamahammer's Avatar
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    Bad or dirty MAF? it may not throw a code but could still be bad?
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    Senior Member chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix is a splendid one to behold chipsofsix's Avatar
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    I get around 500- 550 for City Driving and ive never done all Hwy So i cant say for that.
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  8. #8
    Moderator EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay's Avatar
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    All highway to WF at 100-110 I got probably 650-700.

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    Senior Member thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt's Avatar
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    300-350 if im lucky...

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    Quote Originally Posted by Ricas View Post
    Change to Shell V-Power. Sunoco uses ethanol in their fuel with makes the fuel burn faster. It should improve your mileage by about 50km per tank, me thinks. At least that's what I noticed when I switched from Sunoco Ultra 94 to Shell V-Power on my 1.8T.
    End result is the same, but ethanol actually burns slower (same with higher octane fuel) which results in in-complete combustion and less power/economy on the same amount fuel/air. If your engine is tuned for higher octane then it burns properly (more spark advance helps too!).
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  11. #11
    Senior Member xLilJayx is a jewel in the rough xLilJayx is a jewel in the rough xLilJayx is a jewel in the rough xLilJayx is a jewel in the rough xLilJayx's Avatar
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    i get 300-350 with my 2L aba stg3 turbo.. and i drive speed limits, unless someone cuts me off.... mainly city driving though
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    Quote Originally Posted by thekatt View Post
    300-350 if im lucky...
    lay off teh boost

    is that all city?
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  13. #13
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    You guys getting 300-350 either have LEAD feet or have brutally rich tunes.
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    Senior Member thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt's Avatar
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    yea my 300-350 is pretty much all city. Petro 94oct with 630cc.

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    Moderator soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute
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    did you get 630 right of the bat?

    i get min400 easy mixed driving

    maybe you need c2 well united motorsport now
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    Quote Originally Posted by Zuber Speed View Post
    ....back when I was hardcore

  16. #16
    Senior Member thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt's Avatar
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    yea i will definetely be getting a proper tune one everything is in place the way i want it. i kind of have a heavy foot too... its kind of hard not to :P

  17. #17
    Veteran Member jayred is on a distinguished road jayred's Avatar
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    I did some experimenting with my 2.0T FSI recently. I drive to and from Mississauga on the 401 every day to Mississauga Rd from Guelph. I run 91 APR software and have pretty much only ever used Shell 91 Octane.
    For the longest time I would just go with the speed of traffic in the left lane which ranged from 120-140km/h and I was seeing about 9.5L/100kms on the way to work and 10.5L/100kms on the way home. This would get me about 500-550kms on a tank of gas.
    With the recent increase in gas I decided to cut back and hang out in the right lane averaging 105-110km/h and my best day on the way to work was 6.2L/100km and on the way home about 7.2L/100km. The way home is usually worse because you start out in traffic vs. on the way to work I don't hit traffic until the car has been warmed up and running for a while. This gets me about 680-750kms on a tank of gas.
    When driving around in the city running errands I get like 13.5l/100kms and its just brutal.
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  18. #18
    Moderator EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay's Avatar
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    Good Work. Its amazing the difference 20km/h makes.

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    Senior Member bigcol is an unknown quantity at this point bigcol's Avatar
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    I run mostly city driving, well actually my wife uses the car mostly for just running to and from the GO Train in Oakville. Maybe 5km each way. I will check the tire pressure on the weekend. Last Summer I was hitting in the 550 mark on a full tank, so that appears normal. Could it possibly be a dirty MAF ? I will also try the Shell V-Power 91.
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    If it's always short trips like that, I doubt the car is ever up to proper operating temperature, so it's just puking through fuel trying to get warmed up. It's not surprising to see such shitty mileage in the winter if the longest drive is 5km.
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    Veteran Member Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen has a reputation beyond repute Jurjen's Avatar
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    Quote Originally Posted by EMSbyDay View Post
    Good Work. Its amazing the difference 20km/h makes.
    With our big trucks, slowing down from 120 to 100kph literally improved fuel economy by 50%.

    Cars obviously weigh less, and more aerodynamic, but the same rules apply.

    Good rule of thumb is for every 5kph over 90, fuel consumption goes up 10%. (Obviously not a linear relationship but works well for quick calculatioins)

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    Moderator wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons's Avatar
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    Drag increases with a square of speed increases, meaning if you go twice as fast you quadruple the drag (and roughly quadruple the power needed to maintain speed).
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    Veteran Member Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute Zuber Speed has a reputation beyond repute
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    Quote Originally Posted by bigcol View Post
    I run mostly city driving, well actually my wife uses the car mostly for just running to and from the GO Train in Oakville. Maybe 5km each way. I will check the tire pressure on the weekend. Last Summer I was hitting in the 550 mark on a full tank, so that appears normal. Could it possibly be a dirty MAF ? I will also try the Shell V-Power 91.
    Thats why you are getting shit gas mileage

    Im in the same boat. In the winter, I ONLY used my car to drive to the GO station and back, 4km each way. Id get MAYBE 300 to a tank

    When I actually drive my car, I get ~550 to a tank
    24v

  24. #24
    Veteran Member Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz has a reputation beyond repute Kooz's Avatar
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    Not as bad as my work truck:
    5.4L Triton V8
    18.6 L/100km (12.6 mpg)

    At that rate, a 135L tank doesn't last as long as you think.
    12V

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