The consensus is this will vary between cars, sometimes significantly. I don't think there is a happy medium here.
I filled up the other day, 15~ gallons, had 350 miles already clocked in (I reset at the pump every fill-up), had three dots left, range light warning had not yet come on (which usually occurs somewhere driving with only three dots remaining)
Basically, just learn the car you drive is the easiest answer to this one.
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2013 Pearl White (Base) 7A - DD 
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