Disney Pixar Cars Billy Oilchanger Octane Gain 58 Piston Cup Race Car Die-Cast Brand new in package This is a Disney Pixar Cars Billy Oilchanger Octane Gain 58 die-cast car from the Piston Cup Race series by Mattel. The car is yellow in color and is part of the Disney theme. It comes in an unopened box and is recommended for children aged 3 and up. The vehicle type is a car, made of diecast material, and suitable for both boys and girls.