for title of the most efficient hybrid sedan. Using an updated version of the full-hybrid system featured in the most recent Ford Escape and Mercury Mariner hybrids, the Fusion Hybrid is expected to return an impressive 39 mpg on the EPA city test cycle. If the Fusion Hybrid (and the mechanically identical Mercury Milan Hybrid) can achieve this figure, it will represent a 5-mpg improvement over the front-wheel-drive Escape/Mariner Hybrids and a 6-mpg improvement compared to the Toyota ...