2006 Cadillac STS Sedan

- 

4,565 cc 4.6 liters V 8 front engine with 93 mm bore, 84 mm stroke, 10.5 compression ratio, double overhead cam, variable valve timing/camshaft and four valves per cylinder LH2

- 

Premium unleaded fuel 91

- 

Fuel economy EPA highway (mpg): 26 and EPA city (mpg): 17

- 

Multi-point injection fuel system

- 

17 gallon main premium unleaded fuel tank

- 

Power: 239 kW , 320 HP SAE @ 6,400 rpm; 315 ft lb , 427 Nm @ 4,400 rpm