2021 Cadillac CT5 Oil Type & Capacity
The 2021 Cadillac CT5 oil type depends on the engine: the 2.0L takes 0W-20 (5.3 quarts qt with filter); the 3.0L takes 5W-30 (6.0 quarts qt with filter); the 3.0L takes 5W-30 (6.5 quarts qt with filter); the Luxury, 4WD takes 0W-20 (5.3 quarts qt with filter); the Luxury, RWD takes 0W-20 (5.3 quarts qt with filter); the Sport, 4WD takes 0W-20 (5.3 quarts qt with filter); the Sport, RWD takes 0W-20 (5.3 quarts qt with filter); the V, 4WD takes 5W-30 (6.5 quarts qt with filter); the V, RWD takes 5W-30 (6.0 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- 2.0L: 0W-20, 5.3 quarts with filter
- 2.0L: 0W-20, 5.3 quarts with filter
- 3.0L: 5W-30, 6.0 quarts with filter
- 3.0L: 5W-30, 6.5 quarts with filter
- Luxury, 4WD: 0W-20, 5.3 quarts with filter
- Luxury, RWD: 0W-20, 5.3 quarts with filter
- Sport, 4WD: 0W-20, 5.3 quarts with filter
- Sport, RWD: 0W-20, 5.3 quarts with filter
- V, 4WD: 5W-30, 6.5 quarts with filter
- V, RWD: 5W-30, 6.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 2.0L — Premium Luxury, 2.0L Eng VIN K, 4WD, 2.0L Eng | SAE 0W-20 | 5.30 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. |
| 2.0L — Premium Luxury, 2.0L Eng VIN K, RWD, 2.0L Eng | SAE 0W-20 | 5.30 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. |
| 3.0L — Premium Luxury, 3.0L Eng VIN W, RWD, 3.0L Eng,RWD | SAE 5W-30 | 6.00 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. In an area of extreme cold, where the temperature falls below -29Deg.C (-20Deg.F), an SAE 0W-30 oil may be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. |
| 3.0L — Premium Luxury, 3.0L Eng VIN W, 4WD, 3.0L Eng,4WD | SAE 5W-30 | 6.50 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. In an area of extreme cold, where the temperature falls below -29Deg.C (-20Deg.F), an SAE 0W-30 oil may be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. |
| Luxury, 4WD — 2.0L Eng | SAE 0W-20 | 5.30 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. |
| Luxury, RWD — 2.0L Eng | SAE 0W-20 | 5.30 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. |
| Sport, 4WD — 2.0L Eng | SAE 0W-20 | 5.30 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. |
| Sport, RWD — 2.0L Eng | SAE 0W-20 | 5.30 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. |
| V, 4WD — 3.0L Eng,4WD | SAE 5W-30 | 6.50 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. In an area of extreme cold, where the temperature falls below -29Deg.C (-20Deg.F), an SAE 0W-30 oil may be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. |
| V, RWD — 3.0L Eng,RWD | SAE 5W-30 | 6.00 QTS. | — | ACDelco dexos1 gen 2 full synthetic engine oil. In an area of extreme cold, where the temperature falls below -29Deg.C (-20Deg.F), an SAE 0W-30 oil may be used. An oil of this viscosity grade will provide easier cold starting for the engine at extremely low temperatures. |
More factory specs & repair guides for your CT5
🛞 2021 Cadillac CT5 Tire Size & Pressure →🌧️ 2021 Cadillac CT5 Wiper Blade Sizes →💡 2021 Cadillac CT5 Light Bulb Sizes →📖 2021 Cadillac CT5 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.0 quarts (10.4 L) — 50/50 mixture of DEX-COOL and clean, drinkable water. All capacities are approximate. When adding, be sure to fill to the approximate level. Recheck the fluid level after filling.
Frequently asked questions
What type of oil does a 2021 Cadillac CT5 take?
It depends on the engine: 2.0L uses 0W-20; 3.0L uses 5W-30; 3.0L uses 5W-30; Luxury, 4WD uses 0W-20; Luxury, RWD uses 0W-20; Sport, 4WD uses 0W-20; Sport, RWD uses 0W-20; V, 4WD uses 5W-30; V, RWD uses 5W-30.
What is the oil capacity of a 2021 Cadillac CT5?
Oil capacity depends on the engine: 2.0L holds 5.3 quarts with filter; 3.0L holds 6.0 quarts with filter; 3.0L holds 6.5 quarts with filter; Luxury, 4WD holds 5.3 quarts with filter; Luxury, RWD holds 5.3 quarts with filter; Sport, 4WD holds 5.3 quarts with filter; Sport, RWD holds 5.3 quarts with filter; V, 4WD holds 6.5 quarts with filter; V, RWD holds 6.0 quarts with filter.
How often should I change the oil in my 2021 Cadillac CT5?
Most 2021 Cadillac CT5 owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — Cadillac recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 2021 Cadillac CT5?
Yes. 0W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2021 Cadillac CT5. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.