2006 Cadillac STS Oil Type & Capacity
The 2006 Cadillac STS oil type depends on the engine: the Base, 3.6 7, AWD takes 5W-30 (6.0 quarts with filter); the Base, 3.6 7, RWD takes 5W-30 (6.0 quarts with filter); the Base, 4.6 A, AWD takes 5W-30 (8.0 quarts with filter); the Base, 4.6 A, RWD takes 5W-30 (8.0 quarts with filter); the V takes 5W-30 (9.0 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- Base, 3.6 7, AWD: 5W-30, 6.0 quarts with filter
- Base, 3.6 7, RWD: 5W-30, 6.0 quarts with filter
- Base, 4.6 A, AWD: 5W-30, 8.0 quarts with filter
- Base, 4.6 A, RWD: 5W-30, 8.0 quarts with filter
- V: 5W-30, 9.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Base, 3.6 7, AWD — 3.6L Eng | API - SAE 5W-30 | 6.00 QTS. | — | For V6 engines: use oil that meets GM Standard GM 6094M. For V8 engines: Use oil that meets GM Standards GM 4718M. DO NOT use other viscosity oils such as SAE 20W-50. |
| Base, 3.6 7, RWD — 3.6L Eng | API - SAE 5W-30 | 6.00 QTS. | — | For V6 engines: use oil that meets GM Standard GM 6094M. For V8 engines: Use oil that meets GM Standards GM 4718M. DO NOT use other viscosity oils such as SAE 20W-50. |
| Base, 4.6 A, AWD — 4.6L Eng | API - SAE 5W-30 | 8.00 QTS. | — | For V6 engines: use oil that meets GM Standard GM 6094M. For V8 engines: Use oil that meets GM Standards GM 4718M. DO NOT use other viscosity oils such as SAE 20W-50. |
| Base, 4.6 A, RWD — 4.6L Eng | API - SAE 5W-30 | 8.00 QTS. | — | For V6 engines: use oil that meets GM Standard GM 6094M. For V8 engines: Use oil that meets GM Standards GM 4718M. DO NOT use other viscosity oils such as SAE 20W-50. |
| V — 4.4L Eng | API - SAE 5W-30 | 9.00 QTS. | — | For V6 engines: use oil that meets GM Standard GM 6094M. For V8 engines: Use oil that meets GM Standards GM 4718M. DO NOT use other viscosity oils such as SAE 20W-50. |
Buy the right oil
Buy 5W-30 motor oil on Amazon2006 Cadillac STS oil filter on AmazonAs an Amazon Associate we earn from qualifying purchases made through these links.
More specs & repair guides for your STS
2006 Cadillac STS factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
11.7 quarts (11.07 L) — 50/50 mixture of DEX-COOL and clean drinkable water
Frequently asked questions
What type of oil does a 2006 Cadillac STS take?
It depends on the engine: Base, 3.6 7, AWD uses 5W-30; Base, 3.6 7, RWD uses 5W-30; Base, 4.6 A, AWD uses 5W-30; Base, 4.6 A, RWD uses 5W-30; V uses 5W-30.
How much oil does a 2006 Cadillac STS take?
Capacity depends on the engine: Base, 3.6 7, AWD holds 6.0 quarts with filter; Base, 3.6 7, RWD holds 6.0 quarts with filter; Base, 4.6 A, AWD holds 8.0 quarts with filter; Base, 4.6 A, RWD holds 8.0 quarts with filter; V holds 9.0 quarts with filter.
Can I use synthetic oil in my 2006 Cadillac STS?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2006 Cadillac STS. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.