1991 Pontiac Grand Prix Oil Type & Capacity
The 1991 Pontiac Grand Prix oil type depends on the engine: the GT, 3.1 T takes 5W-30 (4.0 quarts with filter); the GT, 3.4 X, Automatic takes 5W-30 (5.0 quarts with filter); the GT, 3.4 X, Standard takes 5W-30 (5.0 quarts with filter); the GTP takes 5W-30 (5.0 quarts with filter); the LE, 2.3 D, 125C/MD9 takes 5W-30 (4.0 quarts with filter); the LE, 2.3 D, 3T40/MD9 takes 5W-30 (4.0 quarts with filter); the LE, 3.1 T takes 5W-30 (4.0 quarts with filter); the SE, 2D Coupe, 2.3 D, 125C/MD9 takes 5W-30 (4.0 quarts with filter); the SE, 2D Coupe, 2.3 D, 3T40/MD9 takes 5W-30 (4.0 quarts with filter); the SE, 2D Coupe, 3.1 T takes 5W-30 (4.0 quarts with filter); the SE, 2D Coupe, 3.4 X, Automatic takes 5W-30 (5.0 quarts with filter); the SE, 2D Coupe, 3.4 X, Standard takes 5W-30 (5.0 quarts with filter); the SE, 4D Sedan, 2.3 D, 125C/MD9 takes 5W-30 (4.0 quarts with filter); the SE, 4D Sedan, 2.3 D, 3T40/MD9 takes 5W-30 (4.0 quarts with filter); the SE, 4D Sedan, 3.1 T takes 5W-30 (4.0 quarts with filter); the SE, 4D Sedan, 3.4 X takes 5W-30 (5.0 quarts with filter); the STE, 3.1 T takes 5W-30 (4.0 quarts with filter); the STE, 3.4 X, Automatic takes 5W-30 (5.0 quarts with filter); the STE, 3.4 X, Standard takes 5W-30 (5.0 quarts with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- GT, 3.1 T: 5W-30, 4.0 quarts with filter
- GT, 3.4 X, Automatic: 5W-30, 5.0 quarts with filter
- GT, 3.4 X, Standard: 5W-30, 5.0 quarts with filter
- GTP: 5W-30, 5.0 quarts with filter
- LE, 2.3 D, 125C/MD9: 5W-30, 4.0 quarts with filter
- LE, 2.3 D, 3T40/MD9: 5W-30, 4.0 quarts with filter
- LE, 3.1 T: 5W-30, 4.0 quarts with filter
- SE, 2D Coupe, 2.3 D, 125C/MD9: 5W-30, 4.0 quarts with filter
- SE, 2D Coupe, 2.3 D, 3T40/MD9: 5W-30, 4.0 quarts with filter
- SE, 2D Coupe, 3.1 T: 5W-30, 4.0 quarts with filter
- SE, 2D Coupe, 3.4 X, Automatic: 5W-30, 5.0 quarts with filter
- SE, 2D Coupe, 3.4 X, Standard: 5W-30, 5.0 quarts with filter
- SE, 4D Sedan, 2.3 D, 125C/MD9: 5W-30, 4.0 quarts with filter
- SE, 4D Sedan, 2.3 D, 3T40/MD9: 5W-30, 4.0 quarts with filter
- SE, 4D Sedan, 3.1 T: 5W-30, 4.0 quarts with filter
- SE, 4D Sedan, 3.4 X: 5W-30, 5.0 quarts with filter
- STE, 3.1 T: 5W-30, 4.0 quarts with filter
- STE, 3.4 X, Automatic: 5W-30, 5.0 quarts with filter
- STE, 3.4 X, Standard: 5W-30, 5.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| GT, 3.1 T — 3.1L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| GT, 3.4 X, Automatic — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| GT, 3.4 X, Standard — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| GTP — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| LE, 2.3 D, 125C/MD9 — 2.3L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| LE, 2.3 D, 3T40/MD9 — 2.3L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| LE, 3.1 T — 3.1L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 2D Coupe, 2.3 D, 125C/MD9 — 2.3L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 2D Coupe, 2.3 D, 3T40/MD9 — 2.3L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 2D Coupe, 3.1 T — 3.1L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 2D Coupe, 3.4 X, Automatic — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| SE, 2D Coupe, 3.4 X, Standard — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| SE, 4D Sedan, 2.3 D, 125C/MD9 — 2.3L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 4D Sedan, 2.3 D, 3T40/MD9 — 2.3L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 4D Sedan, 3.1 T — 3.1L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| SE, 4D Sedan, 3.4 X — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| STE, 3.1 T — 3.1L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 4.00 QTS. | — | — |
| STE, 3.4 X, Automatic — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
| STE, 3.4 X, Standard — 3.4L Eng | API - SAE 5W-30 (Preferred) (Below -20Deg.F to Above 100Deg.F), 10W-30 (0Deg.F to Above 100Deg.F), 30 (40Deg.F to Above 100Deg.F) | 5.00 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Grand Prix
1991 Pontiac Grand Prix factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
12.5 quarts (11.82 L) — 50/50 mixture of Ethylene Glycol Base Antifreeze and water. GM Specification 1825-M.
Frequently asked questions
What type of oil does a 1991 Pontiac Grand Prix take?
It depends on the engine: GT, 3.1 T uses 5W-30; GT, 3.4 X, Automatic uses 5W-30; GT, 3.4 X, Standard uses 5W-30; GTP uses 5W-30; LE, 2.3 D, 125C/MD9 uses 5W-30; LE, 2.3 D, 3T40/MD9 uses 5W-30; LE, 3.1 T uses 5W-30; SE, 2D Coupe, 2.3 D, 125C/MD9 uses 5W-30; SE, 2D Coupe, 2.3 D, 3T40/MD9 uses 5W-30; SE, 2D Coupe, 3.1 T uses 5W-30; SE, 2D Coupe, 3.4 X, Automatic uses 5W-30; SE, 2D Coupe, 3.4 X, Standard uses 5W-30; SE, 4D Sedan, 2.3 D, 125C/MD9 uses 5W-30; SE, 4D Sedan, 2.3 D, 3T40/MD9 uses 5W-30; SE, 4D Sedan, 3.1 T uses 5W-30; SE, 4D Sedan, 3.4 X uses 5W-30; STE, 3.1 T uses 5W-30; STE, 3.4 X, Automatic uses 5W-30; STE, 3.4 X, Standard uses 5W-30.
How much oil does a 1991 Pontiac Grand Prix take?
Capacity depends on the engine: GT, 3.1 T holds 4.0 quarts with filter; GT, 3.4 X, Automatic holds 5.0 quarts with filter; GT, 3.4 X, Standard holds 5.0 quarts with filter; GTP holds 5.0 quarts with filter; LE, 2.3 D, 125C/MD9 holds 4.0 quarts with filter; LE, 2.3 D, 3T40/MD9 holds 4.0 quarts with filter; LE, 3.1 T holds 4.0 quarts with filter; SE, 2D Coupe, 2.3 D, 125C/MD9 holds 4.0 quarts with filter; SE, 2D Coupe, 2.3 D, 3T40/MD9 holds 4.0 quarts with filter; SE, 2D Coupe, 3.1 T holds 4.0 quarts with filter; SE, 2D Coupe, 3.4 X, Automatic holds 5.0 quarts with filter; SE, 2D Coupe, 3.4 X, Standard holds 5.0 quarts with filter; SE, 4D Sedan, 2.3 D, 125C/MD9 holds 4.0 quarts with filter; SE, 4D Sedan, 2.3 D, 3T40/MD9 holds 4.0 quarts with filter; SE, 4D Sedan, 3.1 T holds 4.0 quarts with filter; SE, 4D Sedan, 3.4 X holds 5.0 quarts with filter; STE, 3.1 T holds 4.0 quarts with filter; STE, 3.4 X, Automatic holds 5.0 quarts with filter; STE, 3.4 X, Standard holds 5.0 quarts with filter.
Can I use synthetic oil in my 1991 Pontiac Grand Prix?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Pontiac Grand Prix. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.