2011 Toyota Prius Owners Manual - Page 589

6-1. Specifications n Engine number The engine number is stamped on the engine block as shown. Engine Model Type Bore and stroke Displacement Valve clearance (engine cold) 2ZR-FXE 4-cylinder in line, 4-cycle, gasoline 3.17 × 3.48 in. (80.5 × 88.3 mm) 109.7 cu. in. (1798 cm3) Automatic adjustment Fuel Fuel type Octane Rating Fuel tank capacity (Reference) Unleaded gasoline only 87 (Research Octane Number 91) or higher 11.9 gal. (45 L, 9.9 Imp.gal.) 568 PRIUS_U (OM47685U) DVD