From the Rocky Mountain Institute via Greentech Media a easy method of comparing car costs plus operating (fuel and electric) costs - not to flexible but fun:
The Leaf actually runs about $17,000 less, when you include the total fuel costs over a 10-year period, estimate that gas will cost $3.61 a gallon and include the $7,500 federal tax credit for all-electric cars, according to a cost calculator created by the Rocky Mountain Institute. - http://projectgetready.com/js/tco.html
The Rocky Mountain Institute wants to take the guesswork out of estimating the cost of electric cars. So with its calculator, you can compare a Tesla to a truck.
What costs less? The $26,000 Nissan Leaf or the $24,000 Chevy Impala?