Excessive fuel consumption - Page 2
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Thread: Excessive fuel consumption

  1. #11
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    Quote Originally Posted by ClassicRod View Post
    Greetings All,
    I recently purchased a 2015 Si Coupe with 46k miles
    I noticed that my gas has been going down much faster than I feel it should be. I filled up a fill tank of 91 octane and the fuel economy shows that I have been driving at about 28 MPG and my commute to school is 22 miles total round trip. Just 2 days after I filled up, my gas is reading half a tank. I just want and idea of where the problem could be and if it is or isn’t normal.
    Thanks

    For clarity, are you saying that after 44 miles your fuel gauge went from full to half-full? Otherwise 28mpg isn't bad for the K24, in my limited experience.
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  3. #12
    Platinum Member bfaided1984's Avatar
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    Quote Originally Posted by bdubbin View Post
    For clarity, are you saying that after 44 miles your fuel gauge went from full to half-full? Otherwise 28mpg isn't bad for the K24, in my limited experience.
    I'm curious on that as well. Like several people have stated. 28 for the si is not bad. I think I stay around 26
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  4. #13
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    Quote Originally Posted by Roadcourse View Post
    Try driving like there's an egg under the accelerator pedal. I get 33-34 in all town driving and can get 43 on all highway without trying too hard. The R18 is a great engine ; )
    I can get the same or better with my K24. I drive with the idea that every time i use the brakes, i waste gas. It also explain why i did my first brake job at 200k km. (+ or - 125k miles) I also don't drive that fast anymore. A couple of expensive speed tickets did the trick for me.

    To OP. Did you do a Tune Up to your car, are the brake dragging, alignement..?

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  6. #14
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    Quote Originally Posted by DOHCtor View Post
    I can get the same or better with my K24. I drive with the idea that every time i use the brakes, i waste gas. It also explain why i did my first brake job at 200k km. (+ or - 125k miles) I also don't drive that fast anymore. A couple of expensive speed tickets did the trick for me.

    To OP. Did you do a Tune Up to your car, are the brake dragging, alignement..?

    Marko!
    The car came from the dealership and is certified used. brakes are good, alignment is good, don’t know if a tune up was don’t recently. The tire pressure is at 35 psi. Right now outside temperature is between 50-70 degrees F. I don’t drive the car hard and almost all of the miles I drive are freeway/highway with basically no traffic. There may not be anything wrong with the car I’m just asking bc I have a 2005 Hyundai tiburon GT (2.7 L v6) that is rated for lower Mpg but my fuel last longer than my si with the same driving route and its kinda frustrating.


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  7. #15
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    Yeah the small gas tank doesn’t help


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  8. #16
    Truck? What truck?! scottyrocks's Avatar
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    Quote Originally Posted by jn2k108 View Post
    Yeah the small gas tank doesn’t help
    <coffee out the nose> haha

    Yeah, OP, I have to ask, do you know the capacities of both cars' fuel tanks?

    Never mind, I looked it up.

    2015 Honda Civic Si coupe - 13.2

    2005 Hyundai Tiburon GT - 14.5

    Gee, do ya think 1.3 gallons of capacity would make a difference in how long the fuel lasts?

    Btw, what was your average mpg in the Hyundai?

    Without actual numbers this whole thing is pointless.
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  9. #17
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    After all this car problem chasing, I can only conclude the problem lies elsewhere.
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  10. #18
    Platinum Member bfaided1984's Avatar
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    Quote Originally Posted by Roadcourse View Post
    After all this car problem chasing, I can only conclude the problem lies elsewhere.
    Is it possibly behind the steering wheel? I'm kidding that's mean. Funny tho
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  11. #19
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    Quote Originally Posted by scottyrocks View Post
    <coffee out the nose> haha

    Yeah, OP, I have to ask, do you know the capacities of both cars' fuel tanks?

    Never mind, I looked it up.

    2015 Honda Civic Si coupe - 13.2

    2005 Hyundai Tiburon GT - 14.5

    Gee, do ya think 1.3 gallons of capacity would make a difference in how long the fuel lasts?

    Btw, what was your average mpg in the Hyundai?

    Without actual numbers this whole thing is pointless.
    Our tank is 13.2? I get the light and no dashes and I fill up with 11 gallons.


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  12. #20
    Platinum Member bfaided1984's Avatar
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    Quote Originally Posted by jn2k108 View Post
    Our tank is 13.2? I get the light and no dashes and I fill up with 11 gallons.


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    I've ran it on the light for like 2 days before and still only put like 11.5. I have not once filled up a full 13. Had a 99 civic that would do the same thing. Light would be on for days, never put more than 10 gallons in.
    Whenever I'm suffering from Insomnia, I just look at a picture of a Toyota Camry and I'm straight off.
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