In Pixar's Cars, the retired Hudson Hornet racer who becomes Lightning McQueen's mentor is Doc Hudson.
Doc is the judge and local doctor of Radiator Springs, but his quiet life hides a celebrated racing past. He was a three-time Piston Cup champion and once raced as the Fabulous Hudson Hornet. After a severe crash and a long recovery, he was replaced in the racing world and eventually settled in Radiator Springs.
Doc initially dislikes Lightning's fame-seeking attitude and refuses to help him. Their relationship changes when Doc recognizes Lightning's potential and trains him on the dirt track. The mentorship gives Lightning a deeper understanding of racing, patience, and responsibility.
Doc Hudson is voiced by Paul Newman in Cars. The character is inspired by the real Hudson Hornet, a car associated with early stock-car racing success.