Easy Idle is an antifreeze mark for more inactive cars. It gives them a warm start in a cold morning. It formerly sponsored Ruby Oaks in Cars and an unnamed veteran racer and it is currently sponsoring Harvey Rodcap in Cars 3 in the Piston Cup Racing Series.
- In Cars, the Easy Idle Racer bore the number 51. In Cars 3, the Easy Idle racers bear the number 15, swapping the places of the 1 and the 5, most likely because it would later be the number of Cruz Ramirez. Early artwork, however, shows the veteran racer with the number 51.