Switching from trip miles to odometer
So I decided to start tracking maintenance in Fuelly/Gas Cubby and realized I have to track fillups by odometer instead of trip miles. I know how to change the setting, but my question is how to make the switch without losing data from the last fill up. If I just add the most recent fillup in odometer, it uses 0 as the previous odo reading and therefore no mpg is calculated. If I change the previous fillup's odo to what it was at the time, it loses that fillup's mpg. What's the right way to do this?
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