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Thread: Trip Comp consistantly 16-20% under actual consumption.

  1. #1
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    Trip Comp consistantly 16-20% under actual consumption.

    Any reason behind this? It's literally ****ing useless.

    Check my fuel log, updated my last three with readout mileage.


        __________________________________________

        click to view fuel log View my fuel log 2018 Micra SV manual: 7.2 L/100 km ... 39.1 mpg (Imp) ... 13.8 km/L ... 32.5 mpg (US) ...


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    I'm comparing the trip computer to actual consumption?

        __________________________________________

        click to view fuel log View my fuel log 2018 Micra SV manual: 7.2 L/100 km ... 39.1 mpg (Imp) ... 13.8 km/L ... 32.5 mpg (US) ...


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    Have you compared the odometer to what a GPS indicates?

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    Is the Micra connecting to a GPS somehow?

    Would the Micra not use the same information to give me odometer readings as it does my fuel economy?

        __________________________________________

        click to view fuel log View my fuel log 2018 Micra SV manual: 7.2 L/100 km ... 39.1 mpg (Imp) ... 13.8 km/L ... 32.5 mpg (US) ...


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    Quote Originally Posted by nickels View Post

    Would the Micra not use the same information to give me odometer readings as it does my fuel economy?
    I expect that it does, but I'm just looking for anything that might account for such a large discrepancy. I own a 2014 CUBE, and a 2018 NOTE and both of their readouts are off, but not by that much.
    I put slightly larger tyres on the CUBE (65R instead of 60R) and the calculated mileage went down slightly. In reality the consumption improved when I considered the actual distance covered.

    I don't blame you for despising the economy; you sure put a lot of miles on it.

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    Administrator MetroMPG's Avatar
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    Quote Originally Posted by nickels View Post
    Is the Micra connecting to a GPS somehow?
    No, it's just using a sensor in the transmission.

    Tomcj2 was just asking if you've checked your odometer accuracy.

    Are you resetting the fuel economy gauge at each fill-up and filling the tank to the top each time?

        __________________________________________

        click to view fuel log View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...


  7. #7
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    Resetting odo on each fill up, and filling to the first click on each tank. I can squeeze an extra 1.5l in if I go for the second click, but I avoid doing so. Not that that should affect readings long term by more than a quarter litre high and low/100km.

        __________________________________________

        click to view fuel log View my fuel log 2018 Micra SV manual: 7.2 L/100 km ... 39.1 mpg (Imp) ... 13.8 km/L ... 32.5 mpg (US) ...


  8. #8
    Administrator MetroMPG's Avatar
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    Just FYI, I compared the onboard display vs. actual consumption of a Micra S loaner from Nissan.

    After going 838 km from the previous fill (to the top), it said 4.4 L/100 km. Actual consumption for that fill was 4.8, so it was optimistic by 8%. The ScanGauge read 4.5, or 6% optimistic (which can be calibrated, but wasn't yet). Context for those results.

        __________________________________________

        click to view fuel log View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...


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    Senior Member Azmodon's Avatar
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    838 from a micra... teach me Obi Wan...


        __________________________________________

        click to view fuel log View my fuel log 2015 Micra SV automatic: 7.1 L/100 km ... 39.9 mpg (Imp) ... 14.1 km/L ... 33.3 mpg (US) ...


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