The Mazda L-series is a mid-sized inline 4-cylinder gasoline piston engine designed by Mazda as part of their MZR family, ranging in displacement from 1.8 to 2.5 liters. Introduced in 2001, it is the evolution of the cast-iron block F-engine. It was co-developed with Ford, who owned a controlling stake in Mazda at the time. Ford uses it as their 1.8 L to 2.5 L Duratec world engine and holds a license to develop engines based on the L-series in perpetuity.

The Mercury Milan is a mid-size car that was marketed by the Mercury division of Ford Motor Company. Named after Milan, an Italian city, the Milan was sold across the 2006 to 2011 model years in a single generation. The smaller of two model lines developed to replace the Mercury Sable, it indirectly succeeded the Mercury Mystique as the smallest Mercury sedan.