Not familiar with your vehicle, but it is nice to drive past the gas stations. As for the Leaf, posters on this forum seem to get between the middle 3s and high 5s (miles/kWh), depending in large part on their driving styles and whether they are commuting at 65 on the freeway or doing errands around town at 35-40mph. 4miles/kwh at $.12/kWh would be $.03/mile, a bit higher than your cost. There are also folks who pay nothing because they have solar panels, and others still who get paid (figuratively speaking) because the are on time-of-use metering, selling their high-value peak production while they are at work and charging with cheap super-off-peak power after midnight.