2005 Cadillac STS Sedan

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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 LD8

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Premium unleaded fuel 91

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Fuel economy EPA highway (mpg): 24 and EPA city (mpg): 17

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Multi-point injection fuel system

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17 gallon main premium unleaded fuel tank

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