Oiler is a member of the alien group Dark Spinner, initially seeking Earth Energy but later allying with Earth Granner to protect universal peace. Alongside Clutch and Chamber in their trio, Oiler works to return to their home planet, Dark, after the group's defeat. This return becomes possible when Earth Energy gushes forth due to a pole shift, providing the necessary power. Oiler expresses skepticism about repairing their damaged Mother Ship "Ō," fearing it might take years, but this concern is alleviated when Manriki confidently undertakes the repairs.

Oiler engages socially with Earth Granner members, sharing a Ferris wheel car with Clutch, Go, Joe, and Kakeru during a group visit to Jono Amusement Park. He listens as Clutch and Chamber describe Dark's sunsets and extends an invitation to Joe to visit their home planet, highlighting growing camaraderie. Before departure, Oiler receives a large container of soup from Madoka, symbolizing the bond formed. His leader, Brake, acknowledges their debt to Earth Granner during farewells, with Oiler present as Dark Spinner commits to future cooperation protecting universal peace.

After returning to Dark, Oiler and Dark Spinner transform, renaming themselves "Earth Granner" and remodeling their Gao Granners for space travel. They assist the original Earth Granner team in space missions, now focused on universal protection. Chamber confirms Oiler's continued involvement in this alliance during a video transmission to Earth headquarters.