Adjusting the MPG Reading on the GT to Read Accurately.

    October 30th, 2018


    First, you need to figure out what percentage the MPG reading is off by. 

    1. Figure out the percentage using this formula: GT average economy minus calculated economy divided by the calculated economy. 

    2. On the tuner go to Main Menu->Vehicle set up/settings->Adjust economy display. 

    3. Increase, or decrease by whatever percentage you are off by.  


    *Increase the percentage if the GT is reading lower mileage than you are getting. Decrease the percentage (go negative) if the GT is showing higher mileage than you are getting.

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