RE: Warmer weather, better range.
I mentally divide each octal in to 3 parts (it is easier to visualise 3 parts than anything smaller).
So that makes 24 subdivisions.
There are also an extra 1.5 subdivisions that do not appear above the 8th octal marking (at least, on my car, after extensive mileage measurements and calculations).
So if it is nearer to 1/2 than 3/8ths, I'd call that 11 'units' out of 25.5, so you have used 43%, meaning a total extrapolated range of 55/0.57 = 96.5 miles.