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Best EPA gas mileage cars, trucks and SUVs. Save money by driving the car, truck or SUV with best gas mileage rating.

If anything, the Prius is even better following last year's redesign which made aerodynamic revisions to further reduce drag while also giving the car a sleeker and sportier look. The gas engine size was increased and the electric motor was also strengthened, resulting in both additional power and still better gas mileage performance, with a combined city/highway EPA rating of 50 mpg, simply tops in the conventional hybrid segment. Handling agility was also enhanced thanks to a new suspension tuning and improved electric steering.

Powering the Ford Fusion Hybrid is a 2.5-liter four-cylinder gasoline engine and an electric motor that combine to produce 191 horsepower. The Hybrid comes with a continuously variable automatic transmission (CVT) and makes the 0 to 60 mph sprint in 8.7 seconds, quite respectable for a hybrid. This fuel efficient hybrid is EPA-rated at 41 mpg city and 36 mpg highway.

Powering the Golf TDI is a 2.0-liter four-cylinder turbodiesel that produces a fairly modest 140 horsepower but a robust 236 pound-feet of torque. It's mated with either a standard 6-speed manual transmission or an optional 6-speed dual-clutch automated manual (DSG). The EPA gas mileage rating for the TDI comes in at an outstanding 30 mpg city and 41 mpg highway with the 6-speed manual and 30 city and 42 highway with the DSG.

With times and technology changing so rapidly in the diesel industry, it's hard to keep up with all the latest tuning software, especially for 2007 and later emissions-controlled diesels. Higher emissions standards set by the EPA have led to the development of new emissions technology such as diesel particulate filters (DPFs), exhaust gas recirculation (EGR) systems, and urea injection, called diesel exhaust fluid (DEK).