In summer (for instance) my GOM shows 60 Km range. When I drive into town which is 9 to 10 Km. (on a 60 Km/hr. twisty up and down road of higher elevation, going from the coast to inland) the GOM will show 59 to 60 Km. I didn't pick up 8 or 9 Km. going up hill. Doing my errands and driving home (in the aggregate going down hill) I will have used up half my battery with associated Km accumulated. By then it all comes out in the wash (using full to half battery) but the GOM doesn't seem to be linear. It doesn't register the miles traveled at the beginning and seems to go a little faster at the end of range. The engine comes on when the battery reaches 0 but I haven't done that since the beginning of 2020 with the cancelled car club meetings because of COVID. This Thursday will be the first one since so it will get a test then to see if it still switches at 0 (plus what the Kwh. used is, it was 10.3).