Cheapest cars to fuel

Among 2013 model year cars, these 5 cost the least to drive down the road.
Mitsubishi iMiEV
Base price: $29,125
Fuel: Electricity only
Electric fuel economy: 112 MPGe
Annual fuel cost: $550
The Mitsubishi i-MiEV, like all the cars in this list, is elegible for a $7,500 federal tax credit which would bring its final price down to $21,625. Unfortunately it would be hard to recommend it, even at that price. It's underpowered, uncomfortable and cheap-feeling.

Smart ForTwo ED
Base price: $25,000
Fuel: Electricity only
Electric fuel economy: 107 MPGe
Annual fuel cost: $600
The Smart ForTwo EV is dirt cheap, for a fully electric car. With a $7,500 federal tax credit it will cost you just $17,500. Since electric cars never need to shift gears, the ForTwo ED does away with the most objectionable part of the gasoline-powered Smart ForTwo, which its clumsy automatic transmission. What your left with is a pretty decent, and fun, city car.

Ford Focus BEV
Base price: $39,200
Fuel: Electricity
Electric fuel economy: 105 MPGe
Annual fuel cost: $600
The Ford Focus EV feels unusually heavy for such a small car but it's got smooth, strong performance. It also has clear and informative data displays to help the driver maximize efficiency.
The 2012 Nissan Leaf would have ranked just behind the Focus, but we looked only at 2013 model year cars. The Leaf has not yet been rated by the EPA for the 2013 model year.

Tesla Model S
Base price: $57,400
Fuel: Electricity only
Electric fuel economy: 95 MPGe
Annual fuel cost: $650
The Tesla Model S is a truly remarkable automobile because it takes every possible advantage of the fact that it is electrically driven. With the battery pack in the floor, it has a low center of gravity for great handling plus loads of interior space. Depending on how much you want to spend, it can also have real performance-sedan power. The figures shown here are for the least expensive Model S which has a 60 kilowatt-hour battery pack.

Toyota Prius Plug-in
Base price: $32,000
Fuel: Gasoline/electricity
Electric driving range: 11 miles
Electric fuel economy: 95 MPGe
Gasoline fuel economy: 50 MPG
Annual fuel cost: $850
With plug-in hybrids, in particular, the phrase "your mileage may vary" applies... a lot. That's because much of it depends on how far you drive between recharging the battery. These results are based on the EPA's assumptions about how many miles a typical driver would run their car on gasoline each year.
The Prius Plug-in travels only a short way on electric power, especially in extreme temperatures, but it's enough to boost efficiency, especially if you can recharge a lot.