What was the first Pixar Cars short-film series to feature Mater telling exaggerated stories?

Mater's Tall Tales was the first Pixar Cars short-film series to feature Mater telling exaggerated stories.

The series is part of Cars Toons, a collection of animated shorts centered mainly on Mater and Lightning McQueen. In each episode, Mater claims to have experienced an extraordinary adventure, while McQueen often appears as a participant or listener.

The title deliberately signals the storytelling joke: Mater's accounts are “tall tales,” meaning exaggerated stories that are difficult to believe. The shorts use the characters and setting of the Cars films but are generally lighter and more episodic than the theatrical features.

Mater's Tall Tales should not be confused with Tales from Radiator Springs, another Cars Toons grouping. The broader Cars Toons brand includes both series, while Mater's Tall Tales is the specific early series built around Mater's boastful adventures.