The wide gear ratio spread helps maximize fuel economy by helping lower engine rpm in city and highway driving. (greencarcongress.com)
Variable valve timing helps maximize fuel economy by reducing the engine's pumping work via a delayed closing of the intake valve, which increases the expansion process of the combustion event. (greencarcongress.com)
However, in sixth gear at 65 mph, the engine was running about 2,500 rpm, not the best tuning for maximizing fuel economy. (cnet.com)