What is the title of Pixar's series of Cars shorts starring Mater?

Mater's Tall Tales is the title of Pixar's series of Cars shorts starring Mater.

The series, officially known as Cars Toons: Mater's Tall Tales, centers on Mater telling Lightning McQueen increasingly extraordinary stories about his supposed past adventures. Each short usually ends with details that suggest Mater's stories may have more truth behind them than Lightning first assumes.

The shorts use a compact format and explore genres that the feature films only touch briefly, including emergency rescue, wrestling, time travel, and international espionage. Their exaggerated plots contrast with Mater's ordinary role as Radiator Springs' rusty tow truck.

Mater's Tall Tales first appeared as a Disney Channel and Disney XD series in 2008. It is separate from the feature films Cars, Cars 2, and Cars 3, although the same characters and voice performers are used. A later Cars short-form series, Cars on the Road, premiered in 2022.