Does it matter? Producing electricity is almost trivial to scale up when compared to oil, especially if the political weather forecast for your region is nuclear-friendly.
Not included in these calculations is the wear and tear of a standard gasoline engine, which are still running on pretty much the design of the original 1885 Daimler Reitwagen.
Wolfram has the estimate for you: http://www.wolframalpha.com/input/?i=%2885*kW*h%29%2F%28300*...
Thats half of what you pay per mile with a Prius: http://www.wolframalpha.com/input/?i=%28gas+price%29+*+%281%...
Not included in these calculations is the wear and tear of a standard gasoline engine, which are still running on pretty much the design of the original 1885 Daimler Reitwagen.