Lincoln MKZ Hybrid

If you have love for both the planet and your car, there's no reason you can't have it all. As hybrid, electric and fuel-efficiency have established themselves as the buzzwords of the automotive world, makers of luxury cars have listened. These eight cars make fuel efficiency look good. The MKZ Hybrid gets a remarkable 41mpg in the city and 36 highway, so you can drive more than 500 miles around town before you need to gas up. That means you spend a lot more time looking good in your ride and enjoying the heated and cooled leather seats in the near silent interior. Simply put, this car is a winner.

Porsche Panamera S Hybrid

The 2012 Porsche Panamera S Hybrid may have been beaten by Infiniti’s M Hybrid in a race, but it's still among the best of the fuel-efficient luxury cars. The 3.0-liter V6 produces 333 horsepower; an electric motor adds another 47. The $95,000 price tag puts it at twice the cost of the MKZ- so it comes down to just how much you want the Porsche name on your ride.

Mercedes E350 BlueTec Diesel

There are plenty of reasons to switch to diesel, not the least of which is improved fuel mileage. The E350 fits into a long line of diesel-powered Mercedes cars, dating back to 1935. The mid-size sedan's V6 engine only pumps out 210hp, but comes back with 400lb-ft of torque. It goes from zero to 60mph in 7.2 seconds. For $51,775, you can bring home the BlueTec Diesel, with 24mpg city, 34mph highway.

Infiniti M Hybrid

When it comes to speed, Infiniti is ahead of the game: the M Hybrid is officially the fastest accelerating full hybrid in the world, even taking down Porsche's Panamera S Hybrid in a head to head race. With a combined fuel efficiency of 29mpg, the new record holder brings a lot of muscle and luxury to the green car market.

Fiat 500 Abarth

For $22,000, you can be the owner of the Fiat 500 Abarth, the car that "feels like a double shot of espresso straight to your veins,” according to Tim Kuniskis, Head of Fiat Brand for North America, Chrysler Group LLC.. With a different look for a luxury car, the 500 gets a combined 33mpg, enough to power its 160 horsepower and 170 lb-ft. of torque all day.

Audi A6

Knocking out combined 28mpg, the A6 runs for $41,700. Audi knows how to build a luxury car. The A6 comes with a keyless start function and can turn on your house lights as well as open your garage door. The cruise control function lets you stay a set distance back from the car in front of you, and an infrared camera can detect pedestrians up to 300 feet away at night.

Lexus CT 200h

With an impressive 43mpg in the city and 40mpg highway, the CT200h is among the best green cars on the road today. Priced at just below $30,000, the CT features a warning sound when in EV mode, so unassuming pedestrians stay safe.

Audi A3 TDI

Audi's A3 Turbocharged Direct Injection burns diesel for an impressive 42mpg highway, and gets 30mpg in the city. It's been popular since its 2010 debut, largely thanks to its exquisite interior. Follow Alex on Twitter.

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