The Cadillac XTS equipped with the 3.6-liter V6 typically takes about 6 quarts (roughly 5.7 liters) of engine oil when you perform a full change, including the oil filter. Use Dexos1 Gen 2 certified 5W-30 synthetic oil for most markets and model years.
Capacity and specifications
Here are the key figures and considerations you should know when planning oil changes for the XTS 3.6L:
- Oil capacity (with filter): 6 quarts (5.7 L)
- Recommended oil viscosity/spec: Dexos1 Gen 2, 5W-30 synthetic
- Typical oil change interval: about every 7,500 miles (12,000 km) under normal driving; more frequently under severe conditions
- Oil filter: replace at every full oil change
These figures reflect the common configuration used in many 2013–2019 XTS models with the 3.6L V6. Always confirm against your vehicle’s owner’s manual or a GM service bulletin for your exact year and drivetrain variant, as small differences can occur.
Practical tips and maintenance reminders
To ensure a correct fill and long-term engine health, follow these practical guidelines when servicing the XTS 3.6L:
Oil grade and viscosity
Use Dexos1 Gen 2 5W-30 synthetic oil unless your manual specifies an alternative for your climate or region. Some markets may accept other Dexos-approved grades, but 5W-30 is the common standard for this engine in most conditions.
Checking and topping up oil
Always check the oil level with the engine warm and on level ground. Remove the dipstick, wipe clean, reinsert fully, then pull out to read. If the level is low, add small amounts of oil gradually and recheck to avoid overfilling.
Maintenance planning
Keep a maintenance log and adhere to the recommended interval unless you drive under severe conditions (extensive idling, frequent short trips, towing, or extreme temperatures), which may shorten the interval.
Summary
For the Cadillac XTS with the 3.6L V6, plan for approximately 6 quarts of engine oil, including the filter, when performing a full oil change. Use Dexos1 Gen 2 5W-30 synthetic oil and follow the vehicle’s manual for exact intervals and any year-specific variations. Regularly check the oil level and never exceed the full mark on the dipstick.