The 2004 Cadillac CTS typically uses 5W-30 engine oil, with a total capacity of about 5 quarts including the filter.
Oil grade and options for the 2004 CTS
For the CTS's 3.2-liter V6, 5W-30 is the standard viscosity in most climates. You can choose conventional, synthetic, or a synthetic blend, as long as the oil meets the general gasoline engine service requirements and suits your driving conditions.
Common oil choices for this engine include:
- 5W-30 conventional motor oil
- 5W-30 synthetic motor oil
- 5W-30 synthetic blend motor oil
In short, 5W-30 is the recommended viscosity; you may use conventional, synthetic, or synthetic blend oil based on preference and climate, and always follow the owner's manual for exact specifications and change intervals.
Summary
For a 2004 Cadillac CTS, the standard oil is 5W-30 in most climates, with about 5 quarts capacity. Available options include conventional, synthetic, and synthetic blend oils, all using 5W-30. Always verify with the owner's manual and maintain regular oil changes to protect the 3.2L V6 engine.