One problem related to engine oil leaking has been reported for the 2005 Cadillac STS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Cadillac STS based on all problems reported for the 2005 STS.
This vehicle has pumped through 5-7 quarts of oil appx every 500 miles. I know that this is not normal. Car was overhauled, the trans was basically rebuilt, with new components. Problem with oil evaporating at very low mileage still an issue. ** leaks*** or symptoms aside of diminishing oil every said set of miles. Very frustrating issue that hasnt been resolved.