Cadillac CT6
Data verified by Nick Marchenko, PhD
The 2016–2020 Cadillac CT6 offers a range of engine options, each requiring specific oil maintenance to ensure optimal performance. The LGW 3.0L V-6 and LGX 3.6L V-6 engines both require 6 quarts of 5W-30 oil, while the LSY 2.0L Turbo I-4 engine needs 5.3 quarts of 0W-20 oil. The LTG 2.0L Turbo I-4 engine has a slightly lower capacity of 5 quarts of 5W-30. Regular oil changes are essential to maintain engine health and performance, particularly for high-performance engines like those in the CT6.
In addition to oil maintenance, it's important to monitor coolant levels. The LGW engine has a coolant capacity of 13 quarts, while the LGX has 10.4 quarts, the LSY holds 11 quarts, and the LTG requires 10.9 quarts. Keeping the coolant at the proper level helps prevent overheating and ensures the longevity of your Cadillac CT6.
Cadillac CT6 Oil Capacity
| Engine | Oil Capacity | Viscosity | Coolant | Years |
|---|---|---|---|---|
| LGW High Feature 3.0 The LGW engine has a displacement of 3.0L V-6. The power output is 404 hp with a torque of 400 lb-ft. | 6.0 qt | 5W-30 | 13.0 qt | 2020, 2019, 2018, 2017, 2016 |
| LGX General Motors DOHC V6 GM High Feature The LGX engine has a displacement of 3.6L V-6. | 6.0 qt | 5W-30 | 10.4 qt | 2019, 2018, 2017, 2016 |
| LSY 2.0L Turbo GM Ecotec 2.0 The LSY 2.0L Turbo engine has a displacement of 2.0L I-4. The power output is 230 hp with a torque of 258 lb-ft. | 5.3 qt | 0W-20 | 11.0 qt | 2020, 2019 |
| LTG 2.0 L Turbo GM Ecotec 2.0 The LTG 2.0 L Turbo engine has a displacement of 2.0L I-4. | 5.0 qt | 5W-30 | 10.9 qt | 2018, 2017, 2016 |
Cadillac CT6 – Frequently Asked Questions
How many quarts of oil does the Cadillac CT6 take?
The Cadillac CT6 oil capacity varies by engine: LGW: 6.0 qt; LGX: 6.0 qt; LSY 2.0L Turbo: 5.3 qt; LTG 2.0 L Turbo: 5.0 qt. Always confirm the exact capacity for your specific engine before an oil change.
What type of oil does the Cadillac CT6 use?
Oil viscosity depends on the engine: LGW, LGX, LTG 2.0 L Turbo: 5W-30; LSY 2.0L Turbo: 0W-20. Check your owner's manual for the correct spec for your specific engine.
What is the coolant capacity of the Cadillac CT6?
The coolant capacity for the Cadillac CT6 varies by engine: LGW: 13.0 qt; LGX: 10.4 qt; LSY 2.0L Turbo: 11.0 qt; LTG 2.0 L Turbo: 10.9 qt. Use the coolant specification listed in the owner's manual for your engine variant.
What type of oil does the Cadillac CT6 use?
The Cadillac CT6 uses different types of oil depending on the engine. The LGW and LGX engines require 5W-30 oil, while the LSY engine needs 0W-20 oil.
How many quarts of oil does the Cadillac CT6 take?
The oil capacity varies by engine: the LGW and LGX engines take 6 quarts, the LSY engine takes 5.3 quarts, and the LTG engine takes 5 quarts.
How often should I change oil in a Cadillac CT6?
It is generally recommended to change the oil in your Cadillac CT6 every 7,500 miles or at least once a year, but you should consult your owner’s manual for specific guidelines.
What is the coolant capacity of the Cadillac CT6?
The coolant capacity varies by engine: the LGW engine has a capacity of 13 quarts, the LGX has 10.4 quarts, the LSY holds 11 quarts, and the LTG requires 10.9 quarts.
Does the Cadillac CT6 need synthetic oil?
While not strictly necessary, using synthetic oil in the Cadillac CT6 is recommended for better performance and engine protection, especially for the high-performance LGW and LGX engines.
What happens if I use the wrong oil viscosity in my Cadillac CT6?
Using the wrong oil viscosity can lead to inadequate lubrication, increased engine wear, and potential overheating. It's crucial to use the recommended viscosity for your specific engine.
What is an oil life monitor and how does it work?
An oil life monitor is a system that tracks engine conditions and driving habits to estimate when an oil change is needed. It takes into account factors like engine temperature, revolutions, and driving conditions.
Can I mix synthetic and conventional oil?
While it is technically possible to mix synthetic and conventional oil, it is not recommended as it can reduce the effectiveness of the synthetic oil and compromise engine performance.
How do I know if my Cadillac CT6 has an oil leak?
You can check for oil leaks by looking for oil spots under your vehicle or checking the oil level frequently. If the oil level drops significantly between changes, it may indicate a leak.
What causes excessive oil consumption?
Excessive oil consumption can be caused by worn piston rings, valve seals, or gaskets. It may also occur due to engine overheating or using the wrong oil viscosity.
Should I check my oil when the engine is hot or cold?
It is best to check your oil when the engine is cold and parked on level ground. This ensures a more accurate reading of the oil level.
What is the difference between an oil change and a flush?
An oil change involves draining old oil and replacing it with new oil, while an oil flush is a process that cleans the engine's internal parts and removes sludge and deposits before new oil is added.