The mechanical difference between the trim lines is now the transmission. Most 2011 Odysseys have the same five-speed automatic as in the last van. But the top Touring and Touring Elite trim lines feature the six-speed automatic first seen in the Acura MDX. You'd think that would help fuel economy, and indeed these top trim levels get the best EPA estimated numbers—19 mpg city and 28 mpg highway. But Honda claims that low-resistance tires and aero tweaks on these models are the actual cause for that difference; the extra gear helps more with acceleration and drivability. Either way, the Odyssey's powertrain remains smooth and willing, with minor improvements in horsepower and torque.