2009 Toyota Yaris Owners Manual - Page 476

1-5. Refueling Hang the fuel tank cap on the back of the fuel filler door. 1 Before driving Closing the fuel tank cap When replacing the fuel tank cap, turn it until a clicking sound is heard. After releasing your hand, the cap will turn slightly to the opposite direction. n Fuel types Unleaded gasoline. (Octane Rating 87 [Research Octane Number 91] or higher) n Fuel tank capacity Approximately 11.1 gal. (42.0 L, 9.2 Imp. gal.) 55