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Thread: Speedometer is fast, 2nd Mirage with same problem

  1. #41
    Senior Member
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    Aug 2017
    SW, WI
    United States
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    Quote Originally Posted by mohammad View Post
    isnt the odometer reading based on the speedometer reading?

    if i drove a constant 60km/hour on the speedometer for 1 hour wouldn't the odometer show 60km?
    Yep! distance = speed x time, speed = distance/time, & time = distance/speed

    I apparently look at this differently?

    A speedometer indicates what speed you are traveling at any given moment. An odometer indicates how many miles have been traveled.

    When driving somewhere of any distance, you typically calculate one's average speed. Total distance covered divided by the total time it took to travel that distance. This would include slowing down for traffic, passing someone, or whatever else may occur on the trip. You seldom drive anywhere of distance at constant speed. Even if you calculated one's average speed, it's not really used in a mpg calculation.

    If I travel 100 miles @ 50 mph or 25 mph, I don't use the speed of my car to calculate my mpg for that trip. My mpg is calculated by taking the 100 miles driven & dividing it by how many gallons of gas were used. Traveling 25 mph may require less fuel than doing the same trip @ 50 mph, & that would translate into a higher mpg rating.

    If your speedometer is off, your odometer is most likely off, too. If someone is using larger diameter wheels on a Mirage, the car may be traveling faster than the speedometer indicates, & the odometer would most likely reflect less miles than where actually traveled. I am not disputing that. I am just stating mpg is equal to distance traveled divided by gallons of gas used. I should have typed that the previous sentence first & stopped there!

  2. #42
    Senior Member
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    Apr 2018
    Atlanta Metro
    United States
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    Quote Originally Posted by Mark View Post
    I don't share you love of governmental mandates, but I respect the fact that you embraced them. I am not saying all mandates are bad either.
    I respect the fact that you respect the fact that he embraces mandates. And I respect the fact and agree with your comment about all mandates not being bad either.


        click to view fuel log View my fuel log 2020 Mirage ES 1.2 manual: 42.7 mpg (US) ... 18.1 km/L ... 5.5 L/100 km ... 51.3 mpg (Imp)

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