higbyz
Well-Known Member
It is lifetime . Every time you reset it, it starts over. I never hit reset and it changes as I drive up a steep mountain Rd. It gives you up to date average mpg. For instance, if I moved to the city tomorrow and left it alone my average mpg would start to drop and settle in at a different average. Its dynamic, it changes as you drive but not significantly if you are constant in your habits and geographyI don't think the average mileage displayed is lifetime. Otherwise it would settle down on a long-term average and not change unless your setup or driving habits changed significantly.
But the MPG average changes day to day or even minute to minute based on current driving so it must be just the average over the last few hundred miles or so.
Source: I know how an arithmetic mean works
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