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The all-new 2011 Ford F-Series Super Duty comes with significantly improved torque and horsepower from both the new 6.7-liter diesel and 6.2-liter gasoline engines. The 2011 Ford Super Duty line, which includes pickup trucks (Ford F-250 through Ford F-450) and chassis cabs (Ford F-350 through Ford F-550). Both the new 6.7-liter Power Stroke V-8 turbocharged diesel and new 6.2-liter gasoline powertrains will deliver significantly improved fuel economy. The architecture of both engines has been optimized for efficiency, as has the new TorqShift heavy-duty six-speed transmission. The 2011 Ford Super Duty new diesel engine is compatible with biodiesel up to B20. Likewise, the new 6.2-liter V-8 gasoline FFV-capable engine can run on E85 ethanol. The 2011 Ford Super Duty also offers the choice of a new 6R140 heavy-duty TorqShift six-speed transmission with the Select Shift Automatic feature.