Engine-Oh is the principal robot of Engine Sentai Go-Onger, the 2008 vehicle-and-machine-themed Super Sentai season. It is formed from three sentient Engines-Speedor, Bus-on, and Bearrv-and can combine with additional Engines for different configurations. The Engines possess individual personalities, making them characters in their own right rather than simply mechanical components. Engine-Oh fights with the Engine Sword and combines high-speed vehicle movement with conventional giant-robot combat. Its bright, colorful design and talking mechanical partners give it a particularly energetic identity.