2008 Toyota Avalon Owners Manual - Page 430

6-1. Specifications Engine Model Type Bore and stroke Displacement Drive belt tension 2GR-FE 6-cylinder V type, 4-cycle, gasoline 3.70 × 3.27 in. (94.0 × 83.0 mm) 210.9 cu.in. (3456 cm3) Automatic adjustment Fuel Fuel type Octane Rating Fuel tank capacity Unleaded gasoline only 87 (Research Octane Number 91) or higher 18.5 gal. (70 L, 15.4 lmp.gal) 408