What is the title of the first Cars short-film series starring Mater?

The first Cars short-film series starring Mater is titled Mater’s Tall Tales.

The series debuted as part of Cars Toons and presents Mater recounting extraordinary adventures, often involving espionage, monster trucks, or time travel. Lightning McQueen typically appears as his listener and companion.

The humor comes from the uncertainty of Mater’s stories: the events are presented through his enthusiastic narration, while the surrounding characters sometimes question whether they really happened. This format allowed Pixar to expand the franchise without making another feature film.

Cars Toons: Mater’s Tall Tales began in 2008. It was followed by other Cars Toons material, including Tales from Radiator Springs. The series is separate from the feature films, although it uses the same characters and setting.