I haven't done a detailed test, but my commute round trip is 40.2mi on Google Maps and I end up getting back home between 39.5-41 miles on my odometer (probably from lane changes, etc). I would say its really close, I'll have to see exactly... I do have a nice fuel friendly drive, the roads are mostly 2 lanes each way with 55mph limit, some really curvy one lane 45mph, then city parkway that's 30mph.
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