Toyota 2008 FJ Cruiser Owner's Manual page 384

6-1. Specifications
Engine number
n
Engine
Model
Type
Bore and stroke
Displacement
Drive belt tension
Fuel
Fuel type
Octane rating
Fuel tank capacity
(Reference)
364
The engine number is stamped
on the engine block as shown.
1GR-FE
6-cylinder V type, 4-cycle, gasoline
3.70 × 3.74 in. (94.0 × 95.0 mm)
241.4 cu.in. (3956 cm
Automatic adjustment
Unleaded gasoline only
91 (Research octane number 96) or higher
19.0 gal. (72.0 L, 15.8 lmp.gal.)
3
)