The 2015 Cadillac CTS uses different oil capacities depending on the engine: about 5.5 quarts for the 2.0L turbo and about 6.0 quarts for the 3.6L V6, including the filter.
In depth, the CTS offered two main engines in 2015, and the oil capacity is specified with a new oil filter installed. The exact amount can vary slightly by your vehicle’s configuration and whether an oil cooler is present. Always verify with the owner's manual and check the dipstick after a change.
Engine options and capacities
Below are the typical oil-change capacities for the two engines used in the 2015 CTS, with the filter installed. These figures provide a practical starting point for maintenance.
2.0L Turbocharged I-4 (LTG)
For the 2.0-liter turbo engine, the approximate oil capacity when performing a full oil change with a new filter is:
- 5.5 quarts (about 5.2 liters).
Note: The 2.0L LTG uses Dexos1 Gen 2 compliant oil, typically in the 5W-30 viscosity range for most climates. Always confirm viscosity recommendations in your owner's manual.
3.6L V6 (LGX)
For the 3.6-liter V6 engine, the approximate oil capacity when performing a full oil change with a new filter is:
- 6.0 quarts (about 5.7 liters).
Note: The 3.6L LGX also uses Dexos1 Gen 2 oil; the most common viscosity is 5W-30, but check your manual for climate-specific guidance.
Practical guidance and tips
To ensure accuracy and proper maintenance, follow these guidelines when changing the oil on a 2015 CTS.
- Always use Dexos1 Gen 2 approved oil. For most environments, this means 5W-30; consult your manual for exact specification.
- After draining and replacing the filter, refill with the recommended quantity, then run the engine and recheck with the dipstick once cooled.
With these steps, you can complete an oil change in accordance with GM's specifications and keep your CTS running smoothly.
Summary
The 2015 Cadillac CTS requires about 5.5 quarts of oil for the 2.0L turbo engine and about 6.0 quarts for the 3.6L V6, when performing an oil change with a new filter. Use Dexos1 Gen 2 approved oil, typically 5W-30, and verify exact capacity and viscosity in your owner's manual for your specific vehicle configuration.
How many quarts of oil for a 2015 Cadillac CTS?
around 6.0 quarts
How much oil does an 2015 Cadillac CTS need? Oil capacity varies by engine and filter; an approximate capacity is around 6.0 quarts—your technician will confirm the exact amount during service.
What kind of oil does a Cadillac CTS V6 take?
Castrol – Edge 5W-30 Full Synthetic Motor Oil, Superior Wear Protection, 5 Quart (Part No.
What kind of oil does a Cadillac CTS 2.0 take?
5W-30
Fits: 2019 Cadillac CTS 2.0L 6,000 Mile Synthetic Oil & Filter Kit (5W-30)
What year of Cadillac CTS to stay away from?
Electrical issues: Electrical problems have popped up in various Cadillac CTS models, with the 2008-2009 and 2013-2014 years facing issues more frequently. These problems range from glitchy infotainment systems to malfunctioning lights and battery failures.