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Thread: Tweaking my miles per gallon display

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    Tweaking my miles per gallon display

    Well it’s been almost 3000 miles and at least seven tanks of gas, and it is hit or miss on whether or not I get a fairly accurate reading on my miles per gallon. It is usually running about 2 miles per gallon high on the overall per tank value vs hand calc. How can I adjust this down even 1 mile per gallon and maybe it could learn the rest? Any help is appreciated.

    Edit, I am of course referring to the “since refuel” screen.

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    Benevolent Dictator Uwe's Avatar
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    I will try to help you with this once you put a link to an Auto-Scan from your car in your forum signature. It has become too tedious for me to have to go through your posting history and try to find a scan, so I can look up exactly how your car is equipped so I can see what we know about it.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    If I only knew how to do that. If there’s an easy way to explain, please do.

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    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by kawzx7 View Post
    If I only knew how to do that. If there’s an easy way to explain, please do.
    In the upper right-hand corner of pretty much any page (while you're logged in), clock on Settings.
    That will take you to a page with a vertical menu on the left hand side.
    In the My Settings section, you'll find Edit Signature.
    That will get you an edit box where you can use BB Code to create a signature that will appear at the bottom of every one of your posts.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by kawzx7 View Post
    In your Instrument Cluster, there should be an Adaptation channel called:
    IDE00499 -- Display correction of consumptions and operating range (%)

    I would guess it's currently set to 100%. Try changing it.
    In older cars, these sorts of channels would sometimes only take changes in 5% increments, so don't be surprised if it won't take smaller changes. But if you're 2 MPG off, 5% should get you pretty close.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Do they accept negative values? Or do you mean set to 95%?

    Edit: set to 95%. We shall see!
    Last edited by kawzx7; 05-24-2019 at 12:56 PM.

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    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by kawzx7 View Post
    Do they accept negative values?
    Why would they? You can't have negative fuel consumption, right?

    Quote Originally Posted by kawzx7 View Post
    Or do you mean set to 95%?
    Edit: set to 95%. We shall see!
    TBH, I'm not sure whether 95% or 105% is the direction you want to go.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

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    Raising the value above 100% heightens the displayed/calculated consumption. So if the car uses more fuel than displayed in the DIS/HMI and you want to fix that, that is the way to go. Likewise a value below 100% reduces the displayed consumption.

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    Quote Originally Posted by Uwe View Post
    Why would they? You can't have negative fuel consumption, right?


    TBH, I'm not sure whether 95% or 105% is the direction you want to go.

    -Uwe-
    Looking like 105%. 95% yielded a 6 mpg discrepancy. 105% should put it right on the money.

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